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BTS 12-18

Thursday, March 15, 2018

Contact: Dave Smallen

Tel: 202-366-5568

BTS Statistics Release: 2017 Annual and December U.S. Airline Traffic Data

The U.S. Department of Transportation's Bureau of Transportation Statistics (BTS) reported today that U.S. airlines carried an all-time high number of passengers during 2017 – 849.3 million systemwide, 741.6 million domestic and 107.7 million international – surpassing the previous high reached in 2016 (Tables A, B, C).

Fig1

The airlines also set all-time annual highs for systemwide, domestic and international revenue passenger miles (RPMs) and available seat-miles (ASMs).

Annual systemwide load factor – the measure of the use of airline capacity – was up slightly from 2016. Domestic load factor was unchanged while international load factor rose because passenger travel growth outpaced capacity expansion (Tables A, B, C). Load factor remained below peak levels of previous years (Tables A, B, C).

Annual Trends:

Passengers

Systemwide passenger enplanements (849.3 million) reached an all-time annual high, up 3.1 percent from the previous high (824.0 million) reached in 2016 (Table A).
Domestic passenger enplanements (741.6 million) reached an all-time annual high, up 3.0 percent from the previous high (720.0 million) reached in 2016 (Table B).
International passenger enplanements (107.7 million) reached an all-time annual high, up 3.5 percent from the previous high (104.0 million) reached in 2016 (Table C).

Revenue Passenger-Miles

Systemwide RPMs (964.3 billion) reached an all-time annual high, up 3.3 percent from the previous high (933.5 billion) reached in 2016 (Table A).
Domestic RPMs (683.7 billion) reached an all-time annual high, up 3.6 percent from the previous high (660.0 billion) reached in 2016 (Table B).
International RPMs (280.6 billion) reached an all-time annual high, up 2.6 percent from the previous high (273.5 billion) reached in 2016 (Table C).

Available Seat-Miles

Systemwide ASMs (1.15 trillion) reached an all-time annual high, up 3.2 percent from the previous high (1.12 trillion) reached in 2016 (Table A).
Domestic ASMs (808.3 billion) reached an all-time annual high, up 3.6 percent from the previous high (780.1 billion) reached in 2016 (Table B).
International ASMs (346.5 billion) reached an all-time annual high, up 2.2 percent from the previous high (338.9 billion) reached in 2016 (Table C).

Load Factor

Systemwide load factor (83.5) was up 0.1 point from 2016 (83.4) but down 0.3 points from the all-time annual high (83.8) reached in 2015 (Table A).
Domestic load factor (84.6) was unchanged from 2016 but down 0.4 points from the all-time annual high (85.0) reached in 2015 (Table B).
International load factor (81.0) was up 0.3 points from 2016 (80.7) but down 1.3 points from the all-time annual high (82.3) reached in 2013 (Table C).

Load factor is a measure of the use of aircraft capacity that compares the system use, measured in RPMs as a proportion of system capacity, measured in ASMs.

December Air Traffic

U.S. airlines' December systemwide (domestic and international) scheduled service passenger enplanements rose 0.1 percent from November, rising to 72.3 million to reach a new all-time seasonally-adjusted high, rising for the third consecutive month (Table 1).

From November 2017 to December 2017 enplanements on domestic flights increased 0.1 percent while enplanements on international flights to and from the U.S. rose 0.1 percent resulting in a 0.1 systemwide increase (Tables 1, 2, 3).

In unadjusted numbers, systemwide, domestic and international enplanements all reached record highs for the month of December (Tables 13, 14, 15).

Trends (Percent changes based on unrounded numbers)

Seasonally-adjusted

The following seasonally-adjusted measures of U.S. airlines' December air traffic reached all-time highs:

Systemwide passenger enplanements (72.3 million) reached a new seasonally-adjusted all-time high, up 0.1 percent from the previous high in November 2017 (72.2 million) (Table 1).
Domestic passenger enplanements (63.22 million) reached a new seasonally-adjusted all-time high, up 0.1 percent from the previous high in November 2017 (63.17 million) (Table 2).
Systemwide available seat-miles (ASMs) (97.7 billion) reached a new seasonally-adjusted all-time high, up 0.2 percent from the previous high in October 2017 (97.4 billion) (Table 7).
Domestic ASMs (68.5 billion) reached a new seasonally-adjusted all-time high, up 0.3 percent from the previous high in August 2017 (68.3 billion) (Table 8).

The following seasonally-adjusted measures of U.S. airlines' December air traffic declined from all-time highs:

International passenger enplanements (9.05 million) were down 0.7 percent from the all-time seasonally-adjusted high (9.11 million) reached in April 2017 (Table 3).
Systemwide revenue passenger miles (RPMs) (81.6 billion) were down 0.3 percent from the all-time seasonally-adjusted high (81.8 billion) reached in November 2017 (Table 4).
Domestic RPMs (58.1 billion) were down 0.2 percent from the all-time seasonally-adjusted high (58.2 billion) reached in November 2017 (Table 5).
International RPMs (23.5 billion) were down 1.2 percent from the all-time seasonally-adjusted high (23.8 billion) reached in April 2017 (Table 6).
International ASMs (29.1 billion) were down 0.3 percent from the all-time seasonally-adjusted high (29.2 billion) reached in October 2017 (Table 9).

Systemwide load factor (83.5) was down 1.3 points from the all-time seasonally-adjusted high (84.8) reached in October 2015 (Table 10). Domestic load factor (84.8) was down 1.1 points from the all-time seasonally-adjusted high (85.9) reached in October 2015 (Table 11). International load factor (80.6) was down 2.5 points from the all-time seasonally-adjusted high (83.1) reached in March 2013 (Table 12).

The seasonally-adjusted load factor fell from November (84.2) to December (83.5) as a result of a 0.3 percent decline in RPMs from November to December combined with a 0.5 percent increase in ASMs (Tables 4, 7).

Seasonally-adjusted trends are for the time period January 2000 to present. Additional data, including domestic and international numbers, can be found on the seasonally-adjusted data page.

Unadjusted

The following unadjusted measures of U.S. airlines' December air traffic reached highs for the month of December:

Systemwide passenger enplanements (70.2 million) reached an all-time December high, up 3.2 percent from the previous high (68.0 million) reached in 2016 (Table 13).
Domestic passenger enplanements (61.2 million) reached an all-time December high, up 3.5 percent from the previous high (59.2 million) reached in 2016 (Table 14).
International passenger enplanements (9.0 million) reached an all-time December high, up 1.7 percent from the previous high (8.8 million) reached in 2016 (Table 15).
Systemwide RPMs (79.6 billion) reached an all-time December high, up 3.4 percent from the previous high (77.0 billion) reached in 2016 (Table 16).
Domestic RPMs (56.9 billion) reached an all-time December high, up 3.9 percent from the previous high (54.8 billion) reached in 2016 (Table 17).
International RPMs (22.7 billion) reached an all-time December high, up 2.3 percent from the previous high (22.2 billion) reached in 2016 (Table 18).
Systemwide ASMs (96.2 billion) reached an all-time December high, up 3.5 percent from the previous high (93.0 billion) reached in 2016(Table 19).
Domestic ASMs (68.2 billion) reached an all-time December high, up 3.8 percent from the previous high (65.7 billion) reached in 2016 (Table 20).
International ASMs (28.0 billion) reached an all-time December high, up 2.8 percent from the previous high (27.3 billion) reached in 2016 (Table 21).

Systemwide load factor (82.7) was down 1.7 points from the all-time December high (84.4) reached in 2013 (Table 22). Domestic load factor (83.5) was down 1.6 points from the all-time December high (85.1) reached in 2013 (Table 23). International load factor (80.8) was down 2.1 points from the all-time December high (82.9) reached in 2013 (Table 24).

Unadjusted trends are for the time period January 1996 to present. Data are available at Customize Table and can be downloaded from the seasonally-adjusted data page.

Explanation of seasonal adjustment

When the primary purpose is to examine monthly shifts in transportation services output and analyze short-term trends, the variation introduced by normal seasonal changes must be removed from the data. Transportation is highly seasonal, and without adjustment, the data do not give an accurate picture of underlying changes in aviation, passenger travel.

Seasonal adjustment of the data removes the seasonal events that follow a regular seasonal pattern. Changes that are not due to seasonality, such as a change in air travel resulting from economic conditions become more readily apparent.

The aviation data are seasonally adjusted for the effects of trading day, moving holidays, and data outliers.

See Seasonal Adjustment for methodology and additional explanation.

Reporting Notes

Data are compiled from monthly reports filed with BTS by commercial U.S. air carriers detailing operations, passenger traffic and freight traffic. This release includes data received by BTS from 77 carriers as of March 6 for U.S. carrier scheduled civilian operations.

Go to the complete list of reporting and non-reporting carriers. U.S. carriers' foreign point-to-point flights are included in system and international totals. To create a customized table for passengers, flights, RPMs, ASMs and other data, including non-scheduled service, go to https://www.transtats.bts.gov/TRAFFIC/

For additional scheduled service numbers for U.S. and foreign airlines, by airline and by airport, see Passengers, Flights, Revenue Passenger-Miles, Available Seat-Miles and Load Factor.

Traffic numbers are available on the BTS website at TranStats. Click on "Aviation." For systemwide passengers, RPMs and ASMs by carrier through December, click on "Air Carrier Summary Data (Form 41 and 298C Summary Data)," and then click on "Schedule T-1." Use crosstabs to find scheduled service.

For domestic numbers through December and international numbers through September by origin as well as by carrier, click on "Aviation," then click on "Air Carrier Statistics (Form 41 Traffic)." Click on "T-100 Market" for system passenger numbers, "T-100 Domestic Market" for domestic or "T-100 International Market" for international. For flights, stage length and trip length, use the appropriate T-100 Segment database. Use crosstabs to find scheduled service.

International totals in this press release consist of all U.S. carrier operations to and from the U.S. and from one foreign point to another foreign point. TranStats T-100 systemwide and international totals do not include U.S. carriers' foreign point-to-point flights. For December, U.S. carriers reported 41,877 foreign point-to-point passengers. For January through December, U.S. carriers reported 634,555 foreign point-to-point passengers.

Data are subject to revision. BTS has scheduled April 12 for the release of January traffic data. None of the data are from samples so measures of statistical significance do not apply.

Annual Tables

Table A. Systemwide U.S. Airlines Annual Air Traffic, 2003-2017

Domestic + International

Scheduled Service Only

	Passengers (in millions)	Revenue Passenger-Miles (in billions)	Available Seat-Miles (in billions)	Load Factor
2003	647.5	657.3	894.6	73.5
2004	703.7	734.0	972.0	75.5
2005	738.6	779.0	1,003.4	77.6
2006	744.7	797.4	1,006.3	79.2
2007	769.6	829.4	1,037.7	79.9
2008	743.3	812.4	1,021.3	79.5
2009	703.9	769.4	957.1	80.4
2010	720.5	798.0	972.6	82.1
2011	730.8	814.4	992.7	82.0
2012	736.7	823.2	994.5	82.8
2013	743.2	840.4	1,011.2	83.1
2014	762.7	862.5	1,034.3	83.4
2015	798.2	902.2	1,077.0	83.8
2016	824.0	933.5	1,119.0	83.4
2017	849.3	964.3	1,154.8	83.5

Source: Bureau of Transportation Statistics, T-100 Market and T-100 Segment

Table B. Domestic U.S. Scheduled Airlines Annual Air Traffic, 2003-2017

Scheduled Service Only

	Passengers (in millions)	Revenue Passenger-Miles (in billions)	Available Seat-Miles (in billions)	Load Factor
2003	583.3	492.7	677.3	72.8
2004	629.8	542.8	728.3	74.5
2005	657.3	569.2	737.1	77.2
2006	658.4	574.5	725.7	79.2
2007	679.2	592.3	741.2	79.9
2008	651.7	568.2	712.3	79.8
2009	618.1	539.0	664.6	81.1
2010	629.5	552.9	672.5	82.2
2011	638.2	563.6	680.1	82.9
2012	642.3	568.7	682.0	83.4
2013	645.6	577.9	692.2	83.5
2014	662.8	595.3	704.4	84.5
2015	696.0	630.7	741.9	85.0
2016	720.0	660.0	780.1	84.6
2017	741.6	683.7	808.3	84.6

Source: Bureau of Transportation Statistics, T-100 Domestic Market and T-100 Domestic Segment

Table C. International U.S. Scheduled Airlines Annual Air Traffic, 2003-2017

Scheduled Service Only

	Passengers (in millions)	Revenue Passenger-Miles (in billions)	Available Seat-Miles (in billions)	Load Factor
2003	64.2	164.6	217.3	75.7
2004	73.9	191.2	243.7	78.5
2005	81.4	209.8	266.3	78.8
2006	86.4	222.9	280.7	79.4
2007	90.5	237.1	296.4	80.0
2008	91.6	244.1	309.0	79.0
2009	85.8	230.4	292.5	78.8
2010	91.0	245.2	300.1	81.7
2011	92.5	250.7	312.6	80.2
2012	94.4	254.5	312.5	81.4
2013	97.5	262.5	318.9	82.3
2014	99.9	267.2	329.9	81.0
2015	102.2	271.6	335.1	81.0
2016	104.0	273.5	338.9	80.7
2017	107.7	280.6	346.5	81.0

Source: Bureau of Transportation Statistics, T-100 International Market and T-100 International Segment

Monthly Seasonally-Adjusted Tables

Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted (Tables 1-3)

Table 1. Systemwide Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted

Systemwide (Domestic + International) passenger enplanements (seasonally adjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	62.82	64.80	67.67	69.64
February	63.14	65.05	67.68	69.62
March	63.94	65.66	67.11	69.99
April	63.52	65.72	67.91	70.48
May	63.50	65.98	68.84	71.02
June	63.43	66.25	69.08	71.12
July	63.66	66.87	68.32	71.66
August	63.57	67.44	68.04	71.42
September	63.73	67.30	69.27	68.07
October	63.60	67.89	69.18	72.13
November	64.01	67.44	69.47	72.21
December	64.14	67.95	69.62	72.26

Source: Bureau of Transportation Statistics, T-100 Market

Table 2. Domestic Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted

Domestic passenger enplanements (seasonally adjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	54.48	56.38	59.02	60.76
February	54.81	56.61	59.02	60.79
March	55.58	57.23	58.47	61.13
April	55.14	57.40	59.38	61.37
May	55.11	57.56	60.27	61.93
June	55.07	57.77	60.38	62.01
July	55.35	58.31	59.68	62.55
August	55.26	58.80	59.43	62.35
September	55.45	58.67	60.62	59.50
October	55.38	59.26	60.50	63.11
November	55.68	58.80	60.82	63.17
December	55.77	59.28	60.76	63.22

Source: Bureau of Transportation Statistics, T-100 Domestic Market

Table 3. International Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted

International passenger enplanements (seasonally adjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	8.33	8.42	8.65	8.88
February	8.33	8.44	8.66	8.83
March	8.37	8.43	8.64	8.86
April	8.38	8.32	8.53	9.11
May	8.39	8.42	8.58	9.09
June	8.36	8.48	8.71	9.11
July	8.31	8.55	8.64	9.11
August	8.31	8.63	8.61	9.07
September	8.28	8.63	8.65	8.56
October	8.22	8.63	8.68	9.02
November	8.33	8.64	8.65	9.04
December	8.37	8.67	8.86	9.05

Source: Bureau of Transportation Statistics, T-100 International Market

Revenue Passenger-Miles on U.S. Airlines, Seasonally-Adjusted (Tables 4-6)

Table 4. Systemwide Revenue Passenger-Miles (RPMs) on U.S. Airlines, Seasonally-Adjusted

Systemwide (Domestic + International) RPMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	71.0	73.2	76.5	79.2
February	71.4	73.6	76.8	78.6
March	72.2	74.4	76.4	79.5
April	71.7	74.0	77.1	80.4
May	71.9	74.7	77.7	80.6
June	71.6	74.9	78.2	80.9
July	71.6	75.6	77.7	81.4
August	71.8	76.1	77.1	81.2
September	72.0	75.9	78.4	77.9
October	72.0	76.8	78.2	81.5
November	72.4	76.2	78.5	81.8
December	73.1	77.1	79.0	81.6

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Table 5. Domestic Revenue Passenger-Miles (RPMs) on U.S. Airlines, Seasonally-Adjusted

Domestic RPMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	48.8	50.7	53.8	56.2
February	49.2	51.0	54.1	55.6
March	49.9	51.8	53.7	56.4
April	49.3	51.9	54.5	56.6
May	49.4	52.1	55.2	57.1
June	49.3	52.4	55.4	57.3
July	49.6	52.8	54.9	57.9
August	49.5	53.2	54.6	57.6
September	49.8	53.1	55.5	54.9
October	49.8	53.9	55.4	58.1
November	50.1	53.5	55.8	58.2
December	50.7	54.3	55.9	58.1

Source: Bureau of Transportation Statistics, T-100 Domestic Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Table 6. International Revenue Passenger-Miles (RPMs) on U.S. Airlines, Seasonally-Adjusted

International RPMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	22.3	22.5	22.8	23.0
February	22.2	22.5	22.7	23.0
March	22.3	22.6	22.7	23.1
April	22.4	22.1	22.6	23.8
May	22.5	22.5	22.6	23.5
June	22.3	22.5	22.8	23.6
July	22.0	22.8	22.9	23.5
August	22.2	22.9	22.6	23.6
September	22.2	22.8	22.9	23.0
October	22.1	22.9	22.8	23.4
November	22.3	22.7	22.7	23.6
December	22.4	22.8	23.1	23.5

Source: Bureau of Transportation Statistics, T-100 International Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Available Seat-Miles on U.S. Airlines, Seasonally-Adjusted (Tables 7-9)

Table 7. Systemwide Available Seat-Miles (ASMs) on U.S. Airlines, Seasonally-Adjusted

Systemwide (Domestic + International) ASMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	84.3	88.3	91.4	95.0
February	85.1	87.6	92.1	94.9
March	86.4	88.7	92.6	95.2
April	85.6	89.4	92.5	95.7
May	85.6	89.7	93.1	96.0
June	86.2	89.5	93.2	96.8
July	86.3	90.3	93.3	97.3
August	86.2	90.6	93.5	97.3
September	86.6	90.6	94.0	95.4
October	87.0	90.6	93.3	97.4
November	87.5	91.1	93.5	97.1
December	88.1	91.5	94.3	97.7

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Table 8. Domestic Available Seat-Miles (ASMs) on U.S. Airlines, Seasonally-Adjusted

Domestic ASMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	57.3	60.5	63.3	66.5
February	57.9	59.9	64.0	66.4
March	58.8	60.9	64.4	66.6
April	58.3	61.5	64.3	66.8
May	58.2	61.8	64.8	67.0
June	58.4	61.6	65.0	67.7
July	58.7	62.2	65.1	68.2
August	58.7	62.4	65.2	68.3
September	59.1	62.4	65.6	66.6
October	59.6	62.7	65.1	68.2
November	59.7	63.2	65.7	68.1
December	60.3	63.3	65.9	68.5

Source: Bureau of Transportation Statistics, T-100 Domestic Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Table 9. International Available Seat-Miles (ASMs) on U.S. Airlines, Seasonally-Adjusted

International ASMs (seasonally-adjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	27.0	27.8	28.1	28.5
February	27.3	27.7	28.1	28.6
March	27.6	27.8	28.2	28.6
April	27.3	27.9	28.1	28.9
May	27.4	27.9	28.3	29.0
June	27.7	27.8	28.3	29.1
July	27.6	28.1	28.2	29.1
August	27.5	28.2	28.3	29.0
September	27.4	28.2	28.3	28.7
October	27.4	27.8	28.2	29.2
November	27.8	27.9	27.7	29.0
December	27.8	28.2	28.4	29.1

Source: Bureau of Transportation Statistics, T-100 International Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Load Factor on U.S. Airlines, Seasonally-Adjusted (Tables 10-12)

Table 10. Systemwide Load Factor on U.S. Airlines, Seasonally-Adjusted

Systemwide (Domestic + International) RPMs/ASMs (both seasonally-adjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	84.3	82.9	83.7	83.4
February	83.9	84.0	83.4	82.8
March	83.5	83.9	82.5	83.5
April	83.8	82.8	83.3	84.0
May	84.0	83.3	83.5	83.9
June	83.2	83.7	83.9	83.6
July	83.0	83.8	83.3	83.7
August	83.3	84.0	82.5	83.5
September	83.1	83.8	83.4	81.7
October	82.7	84.8	83.9	83.7
November	82.7	83.6	84.0	84.2
December	83.0	84.2	83.7	83.5

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).

Table 11. Domestic Load Factor on U.S. Airlines, Seasonally-Adjusted

Domestic RPMs/ASMs (both seasonally-adjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	85.2	83.8	84.9	84.4
February	85.0	85.1	84.6	83.8
March	84.9	85.2	83.4	84.6
April	84.6	84.4	84.7	84.8
May	84.9	84.3	85.1	85.2
June	84.4	85.0	85.2	84.6
July	84.6	84.9	84.2	84.8
August	84.4	85.2	83.7	84.3
September	84.1	85.1	84.5	82.4
October	83.6	85.9	85.1	85.2
November	84.0	84.6	84.9	85.5
December	84.0	85.8	84.8	84.8

Source: Bureau of Transportation Statistics, T-100 Domestic Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).

Table 12. International Load Factor on U.S. Airlines, Seasonally-Adjusted

International RPMs/ASMs (both seasonally-adjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	82.3	80.8	81.0	80.9
February	81.5	81.4	80.8	80.6
March	80.6	81.2	80.4	80.8
April	82.1	79.3	80.2	82.3
May	82.1	80.9	79.9	81.1
June	80.5	80.7	80.7	81.2
July	79.8	81.3	81.0	81.0
August	80.7	81.4	79.8	81.4
September	81.0	81.0	80.8	80.2
October	80.6	82.3	80.9	80.1
November	80.1	81.4	81.9	81.2
December	80.7	80.7	81.2	80.6

Source: Bureau of Transportation Statistics, T-100 International Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).

Monthly Unadjusted Tables

Passenger Enplanements on U.S. Airlines, Unadjusted (Tables 13-15)

Table 13. Systemwide Passenger Enplanements on U.S. Airlines, Unadjusted

Systemwide (Domestic + International) passenger enplanements (unadjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	55.81	57.78	60.81	62.62
February	52.44	54.16	58.50	58.38
March	66.44	68.20	70.56	72.96
April	63.49	65.92	67.24	70.26
May	66.51	68.93	71.52	73.68
June	68.60	71.27	74.50	77.01
July	71.89	75.63	76.89	79.82
August	69.53	72.87	73.45	77.10
September	59.99	63.74	66.48	64.92
October	64.49	68.73	69.54	72.70
November	59.74	64.59	66.59	69.63
December	63.78	66.40	67.98	70.19
Yr. Total	762.71	798.22	824.06	849.27

Source: Bureau of Transportation Statistics, T-100 Market

Table 14. Domestic Passenger Enplanements on U.S. Airlines, Unadjusted

Domestic passenger enplanements (unadjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	47.96	49.73	52.47	54.11
February	45.51	47.17	51.11	51.08
March	57.76	59.56	61.59	63.96
April	55.25	57.70	58.89	61.10
May	57.89	60.25	62.75	64.44
June	59.26	61.81	64.76	66.75
July	61.76	65.13	66.14	68.58
August	59.76	62.77	63.50	66.67
September	52.53	55.99	58.62	57.15
October	57.08	60.89	61.71	64.62
November	52.58	57.15	59.27	61.91
December	55.49	57.87	59.18	61.24
Yr. Total	662.83	696.02	719.99	741.61

Source: Bureau of Transportation Statistics, T-100 Domestic Market

Table 15. International Passenger Enplanements on U.S. Airlines, Unadjusted

International passenger enplanements (unadjusted) in millions (000,000)

Scheduled service only

	2014	2015	2016	2017
January	7.85	8.06	8.33	8.51
February	6.93	7.00	7.39	7.30
March	8.68	8.64	8.96	9.00
April	8.24	8.22	8.34	9.16
May	8.62	8.67	8.76	9.24
June	9.34	9.46	9.74	10.26
July	10.13	10.50	10.75	11.24
August	9.77	10.09	9.95	10.44
September	7.46	7.75	7.86	7.77
October	7.41	7.84	7.83	8.08
November	7.16	7.44	7.32	7.72
December	8.29	8.53	8.81	8.96
Yr. Total	99.88	102.20	104.04	107.68

Source: Bureau of Transportation Statistics, T-100 International Market

Revenue Passenger-Miles on U.S. Airlines, Unadjusted (Tables 16-18)

Table 16. Systemwide Revenue Passenger-Miles (RPMs) on U.S. Airlines, Unadjusted

Systemwide (Domestic + International) RPMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	64.1	66.0	69.3	71.4
February	57.9	59.8	64.6	64.3
March	73.6	75.8	78.7	80.8
April	70.7	73.1	75.1	79.5
May	75.2	78.0	80.8	83.5
June	79.5	82.7	86.5	89.7
July	83.7	88.3	90.6	94.1
August	81.2	85.2	86.1	90.4
September	68.4	72.5	75.3	74.7
October	71.3	76.1	77.3	80.6
November	65.2	70.0	72.2	75.7
December	71.8	74.8	77.0	79.6
Yr. Total	862.5	902.2	933.5	964.3

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Table 17. Domestic Revenue Passenger-Miles (RPMs) on U.S. Airlines, Unadjusted

Domestic RPMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	43.6	45.1	48.1	50.1
February	40.5	42.3	46.5	46.5
March	51.9	53.9	56.7	58.8
April	49.3	51.9	53.6	56.3
May	51.5	54.3	57.1	59.0
June	54.0	57.0	60.3	62.5
July	56.9	60.4	62.4	65.0
August	54.6	57.8	59.3	62.5
September	46.3	49.9	52.7	51.9
October	50.1	54.1	55.3	58.3
November	46.4	50.9	53.3	55.9
December	50.3	53.1	54.8	56.9
Yr. Total	595.3	630.7	660.0	683.7

Source: Bureau of Transportation Statistics, T-100 Domestic Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Table 18. International Revenue Passenger-Miles (RPMs) on U.S. Airlines, Unadjusted

International RPMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	20.5	20.8	21.2	21.3
February	17.3	17.5	18.1	17.8
March	21.8	21.8	22.0	22.1
April	21.5	21.2	21.5	23.2
May	23.7	23.8	23.7	24.5
June	25.5	25.7	26.2	27.2
July	26.8	27.8	28.3	29.1
August	26.6	27.4	26.9	27.9
September	22.1	22.6	22.7	22.8
October	21.2	22.0	22.0	22.4
November	18.8	19.1	18.9	19.8
December	21.5	21.7	22.2	22.7
Yr. Total	267.2	271.6	273.5	280.6

Source: Bureau of Transportation Statistics, T-100 International Segment

Note: Revenue passenger-miles are a measure of the volume of air passenger transportation. A revenue passenger-mile is equal to one paying passenger carried one mile.

Available Seat-Miles on U.S. Airlines, Unadjusted (Tables 19-21)

Table 19. Systemwide Available Seat-Miles (ASMs) on U.S. Airlines, Unadjusted

Systemwide (Domestic + International) ASMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	79.8	83.4	86.3	90.0
February	72.5	74.5	82.0	81.4
March	88.2	90.3	94.2	96.8
April	84.8	88.6	91.6	94.8
May	88.5	92.8	96.4	99.5
June	92.0	95.7	99.9	103.7
July	96.5	101.0	104.4	108.6
August	94.0	98.6	101.8	105.8
September	83.5	87.3	90.4	91.4
October	86.1	89.5	92.2	96.4
November	81.7	84.9	86.9	90.3
December	86.8	90.3	93.0	96.2
Yr. Total	1,034.4	1,076.9	1,119.1	1,154.9

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Table 20. Domestic Available Seat-Miles (ASMs) on U.S. Airlines, Unadjusted

Domestic ASMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	54.0	57.0	59.7	63.1
February	49.4	51.3	57.5	57.4
March	60.7	62.9	66.5	68.7
April	58.0	61.1	63.8	66.1
May	59.7	63.4	66.5	68.8
June	61.8	65.2	68.8	71.7
July	64.8	68.6	71.5	74.8
August	62.9	66.7	70.0	73.2
September	56.5	59.5	62.5	63.1
October	59.6	62.6	64.8	68.0
November	56.9	60.5	62.9	65.1
December	60.3	63.2	65.7	68.2
Yr. Total	704.6	742.0	780.2	808.2

Source: Bureau of Transportation Statistics, T-100 Domestic Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Table 21. International Available Seat-Miles (ASMs) on U.S. Airlines, Unadjusted

International ASMs (unadjusted) in billions (000,000,000)

Scheduled service only

	2014	2015	2016	2017
January	25.8	26.4	26.7	26.9
February	23.1	23.3	24.5	23.9
March	27.5	27.5	27.7	28.0
April	26.8	27.5	27.8	28.7
May	28.8	29.4	29.8	30.6
June	30.2	30.5	31.1	32.0
July	31.7	32.4	32.9	33.8
August	31.1	31.9	31.9	32.6
September	27.0	27.8	27.9	28.3
October	26.5	27.0	27.4	28.4
November	24.7	24.5	24.0	25.1
December	26.6	27.0	27.3	28.0
Yr. Total	329.8	335.2	339.0	346.3

Source: Bureau of Transportation Statistics, T-100 International Segment

Note: Available seat-miles are a measure of the capacity of air passenger transportation. An available seat-mile is equal to one aircraft seat carried one mile.

Load Factor on U.S. Airlines, Unadjusted (Tables 22-24)

Table 22. Systemwide Load Factor on U.S. Airlines, Unadjusted

Systemwide (Domestic + International) RPMs/ASMs (both unadjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	80.3	79.1	80.2	79.4
February	79.8	80.2	78.8	79.0
March	83.5	83.9	83.6	83.5
April	83.4	82.5	82.0	83.9
May	85.0	84.1	83.8	84.0
June	86.4	86.4	86.6	86.5
July	86.7	87.4	86.8	86.6
August	86.5	86.4	84.6	85.5
September	81.9	83.0	83.3	81.7
October	82.8	85.0	83.8	83.6
November	79.8	82.4	83.1	83.8
December	82.6	82.9	82.8	82.7
Yr. Value	83.4	83.8	83.4	83.5

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).

Table 23. Domestic Load Factor on U.S. Airlines, Unadjusted

Domestic RPMs/ASMs (both unadjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	80.7	79.2	80.6	79.5
February	82.1	82.4	80.8	80.9
March	85.5	85.8	85.3	85.5
April	84.9	84.9	84.1	85.2
May	86.3	85.6	85.9	85.7
June	87.4	87.4	87.6	87.2
July	87.8	88.1	87.2	86.9
August	86.9	86.6	84.7	85.4
September	82.1	83.8	84.2	82.2
October	84.1	86.4	85.4	85.7
November	81.4	84.2	84.7	85.8
December	83.5	84.0	83.4	83.5
Yr. Value	84.5	85.0	84.6	84.6

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).

Table 24. International Load Factor on U.S. Airlines, Unadjusted

International RPMs/ASMs (both unadjusted) in percent

Scheduled service only

	2014	2015	2016	2017
January	79.6	78.8	79.5	79.2
February	75.0	75.3	73.9	74.3
March	79.2	79.5	79.4	78.7
April	80.1	77.1	77.3	80.8
May	82.3	80.8	79.3	80.1
June	84.4	84.4	84.5	84.9
July	84.4	85.8	86.0	85.9
August	85.5	86.0	84.3	85.8
September	81.6	81.4	81.1	80.5
October	79.8	81.6	80.1	78.7
November	76.2	78.1	78.9	78.6
December	80.8	80.3	81.2	80.8
Yr. Value	81.0	81.0	80.7	81.0

Source: Bureau of Transportation Statistics, T-100 Segment

Note: Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).