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BTS 45-17

Friday, September 15, 2017

BTS Contact: Dave Smallen

Tel: 202-366-5568

BTS Statistics Release: 2017 Semi-Annual and June 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 the first six months of 2017 – 414.4 million systemwide, 360.9 million domestic and 53.5 million international – surpassing the previous highs reached in 2016 (Tables A, B, C).

Fig1

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

The record number of airline passengers in the first six months of 2017 resulted in fewer systemwide empty seats because growth in international passenger travel outpaced growth in international capacity, offsetting a domestic capacity growth rate that slightly exceeded passenger travel growth. Load factor – the measure of the use of airline capacity – rose from 2016 but remained below peak levels of previous years (Tables A, B, C).

The six-month load factor rose from 2016 (82.7) to 2017 (82.9) because passenger travel (3.1 percent increase in RPMs) grew faster than system capacity (2.8 percent increase in ASMs) (Table A).

Semi-Annual Trends:

Systemwide passenger enplanements (414.4 million) reached an all-time January through June high, up 2.8 percent from the previous high (403.1 million) reached in 2016 (Table A, Figure 1). Domestic passenger enplanements (360.9 million) reached an all-time semi-annual high, up 2.7 percent from the previous high (351.6 million) reached in 2016 (Table B). International passenger enplanements (53.5 million) reached an all-time semi-annual high, up 3.8 percent from the previous high (51.5 million) reached in 2016 (Table C).

Systemwide RPMs (468.9 billion) reached an all-time January through June high, up 3.1 percent from the previous high (454.9 billion) reached in 2016 (Table A). Domestic RPMs (332.8 billion) reached an all-time semi-annual high, up 3.3 percent from the previous high (322.3 billion) reached in 2016 (Table B). International RPMs (136.0 billion) reached an all-time semi-annual high, up 2.5 percent from the previous high (132.7 billion) reached in 2016 (Table C).

Systemwide ASMs (565.8 billion) reached an all-time January through June high, up 2.8 percent from the previous high (550.2 billion) reached in 2016 (Table A). Domestic ASMs (395.6 billion) reached an all-time semi-annual high, up 3.4 percent from the previous high (382.7 billion) reached in 2016 (Table B). International ASMs (170.2 billion) reached an all-time semi-annual high, up 1.6 percent from the previous high (167.5 billion) reached in 2016 (Table C).

Systemwide load factor (82.9) was down 0.3 points from the all-time January through June high (83.2) reached in 2014 (Table A). Domestic load factor (84.1) was down 0.5 points from the all-time semi-annual high (84.6) reached in 2014 (Table B). International load factor (79.9) was down 1.2 points from the all-time semi-annual high (81.2) 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.

June 2017 U.S. Airline Scheduled Service Numbers

Trends (Percent changes based on unrounded numbers)

Seasonally-adjusted

Fig2

Systemwide passenger enplanements (70.9 million) reached a new seasonally-adjusted all-time high, up less than one-tenth of 1 percent from the previous high in May 2017 (70.8 million) (Table 1, Figure 2). Domestic passenger enplanements (61.7 million) were down 0.04 percent from the all-time seasonally-adjusted high (61.74 million) reached in May 2017 (Table 2). International passenger enplanements (9.14 million) reached a new seasonally-adjusted all-time high, up 0.2 percent from the previous high in April 2017 (9.11 million) (Table 3).

Systemwide revenue passenger miles (RPMs) (80.9 billion) reached a new seasonally-adjusted all-time high, up 0.5 percent from the previous high in May 2017 (80.5 billion) (Table 4). Domestic RPMs (57.1 billion) reached a new seasonally-adjusted all-time high, up 0.3 percent from the previous high in May 2017 (56.9 billion) (Table 5). International RPMs (23.8 billion) were down less than one-tenth of 1.0 percent from the all-time seasonally-adjusted high (23.78 billion) reached in April 2017 (Table 6).

Systemwide available seat-miles (ASMs) (96.9 billion) reached a new seasonally-adjusted all-time high, up 0.9 percent from the previous high in May 2017 (96.1 billion) (Table 7). Domestic ASMs (67.8 billion) reached a new seasonally-adjusted all-time high, up 1.1 percent from the previous high in May 2017 (67.1 billion) (Table 8). International ASMs (29.2 billion) reached a new seasonally-adjusted all-time high, up 0.4 percent from the previous high in May 2017 (29.1 billion) (Table 9).

Systemwide load factor (83.5) was down 1.2 points from the all-time seasonally-adjusted high (84.7) reached in October 2015 (Table 10). Domestic load factor (84.3) was down 1.6 points from the all-time seasonally-adjusted high (85.9) reached in October 2015 (Table 11). International load factor (81.6) was down 1.4 points from the all-time seasonally-adjusted high (83.0) reached in March 2013 (Table 12).

The seasonally-adjusted load factor declined from May (83.8) to June (83.5) despite growth in passenger travel (0.5 percent increase in RPMs) because system capacity grew more (0.9 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

Systemwide passenger enplanements (76.94 million) reached an all-time high for any month, up less than one-tenth of 1.0 percent (0.08 percent) from the previous high (76.88 million) reached in July 2016 and up 3.3 percent from the previous June high (74.5 million) reached in 2016 (Table 13, Figure 3). Domestic passenger enplanements (66.7 million) reached an all-time high for any month, up 0.8 percent from the previous high (66.1 million) reached in July 2016 and up 3.0 percent from the previous June high (64.8 million) reached in 2016 (Table 14). International passenger enplanements (10.3 million) reached an all-time June high, up 5.3 percent from the previous high (9.7 million) reached in 2016 (Table 15).

Systemwide RPMs (89.7 billion) reached an all-time June high, up 3.6 percent from the previous high (86.5 billion) reached in 2016 (Table 16). Domestic RPMs (62.5 billion) reached an all-time high for any month, up 0.2 percent from the previous high (62.3 billion) reached in July 2016 and up 3.6 percent from the previous June high (60.3 billion) reached in 2016 (Table 17). International RPMs (27.2 billion) reached an all-time June high, up 3.7 percent from the previous high (26.2 billion) reached in 2016 (Table 18).

Systemwide ASMs (103.7 billion) reached an all-time June high, up 3.9 percent from the previous high (99.9 billion) reached in 2016 (Table 19). Domestic ASMs (71.7 billion) reached an all-time high for any month, up 0.2 percent from the previous high (71.5 billion) reached in July 2016 and up 4.2 percent from the previous high (68.8 billion) reached in 2016 (Table 20). International ASMs (32.0 billion) reached an all-time June high, up 3.2 percent from the previous high (31.1 billion) reached in 2016 (Table 21).

Systemwide load factor (86.4) was down 0.5 points from the all-time June high (87.0) reached in 2013 (Table 22). Domestic load factor (87.1) was down 0.5 points from the all-time June high (87.6) reached in 2016 (Table 23). International load factor (84.9) was down 2.0 points from the all-time June high (86.9) 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 83 carriers as of Sept. 6 for U.S. carrier scheduled civilian operations.

Go to http://www.transtats.bts.gov/releaseinfo.asp for 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 http://apps.bts.gov/xml/air_traffic/src/index.xml#CustomizeTable

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, the Intermodal Transportation Database, at http://transtats.bts.gov. Click on "Aviation." For systemwide passengers, RPMs and ASMs by carrier through June, 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 June and international numbers through March 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 June, U.S. carriers reported 50,970 foreign point-to-point passengers. For January through June, U.S. carriers reported 353,924 foreign point-to-point passengers.

Data are subject to revision. BTS has scheduled Oct. 13 for the release of July traffic data. None of the data are from samples so measures of statistical significance do not apply.

Semi-Annual Tables

Table A. Systemwide U.S. Airlines Semi-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	312.6	312.7	435.0	71.9
2004	342.1	355.2	475.7	74.7
2005	366.3	383.4	497.9	77.0
2006	369.6	393.5	495.1	79.5
2007	379.7	406.0	509.4	79.7
2008	379.7	412.6	519.9	79.3
2009	345.5	375.2	477.9	78.5
2010	349.6	384.0	473.9	81.0
2011	358.0	397.0	492.1	80.7
2012	363.8	404.3	494.1	81.8
2013	365.8	410.8	496.8	82.7
2014	373.3	421.0	505.7	83.2
2015	386.3	435.3	525.4	82.9
2016	403.1	454.9	550.2	82.7
2017	414.4	468.9	565.8	82.9

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

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

Scheduled Service Only

	Passengers (in millions)	Revenue Passenger-Miles (in billions)	Available Seat-Miles (in billions	Load Factor
2003	282.6	237.1	330.4	71.8
2004	306.5	264.1	358.9	73.6
2005	325.8	280.7	367.1	76.5
2006	326.8	284.9	358.0	79.6
2007	335.2	291.4	364.8	79.9
2008	332.8	290.7	365.3	79.6
2009	303.1	264.1	330.8	79.9
2010	305.4	267.9	329.2	81.4
2011	312.2	275.6	336.7	81.8
2012	317.0	280.1	338.1	82.8
2013	317.9	283.9	340.5	83.4
2014	323.6	290.7	343.5	84.6
2015	336.2	304.4	360.8	84.4
2016	351.6	322.3	382.7	84.2
2017	360.9	332.8	395.6	84.1

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

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

Scheduled Service Only

	Passengers (in millions)	Revenue Passenger-Miles (in billions)	Available Seat-Miles (in billions	Load Factor
2003	30.1	75.6	104.6	72.2
2004	35.6	91.0	116.8	78.0
2005	40.4	102.7	130.8	78.5
2006	42.8	108.6	137.2	79.2
2007	44.5	114.5	144.6	79.2
2008	46.9	121.9	154.7	78.8
2009	42.4	111.1	147.1	75.5
2010	44.2	116.1	144.7	80.2
2011	45.7	121.4	155.3	78.1
2012	46.8	124.2	156.0	79.6
2013	47.9	126.9	156.3	81.2
2014	49.7	130.3	162.2	80.3
2015	50.0	130.9	164.6	79.5
2016	51.5	132.7	167.5	79.2
2017	53.5	136.0	170.2	79.9

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

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	62.84	64.82	67.62	69.53
February	63.13	65.03	67.67	69.52
March	63.98	65.67	67.11	69.74
April	63.48	65.69	67.86	70.33
May	63.49	65.92	68.74	70.84
June	63.36	66.12	68.92	70.85
July	63.67	66.94	68.44
August	63.53	67.41	67.96
September	63.74	67.27	69.28
October	63.60	67.94	69.25
November	64.10	67.53	69.53
December	64.20	68.09	68.82

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	54.50	56.40	59.00	60.69
February	54.81	56.60	59.03	60.72
March	55.61	57.25	58.49	60.90
April	55.10	57.37	59.33	61.21
May	55.10	57.49	60.16	61.74
June	55.00	57.64	60.19	61.72
July	55.35	58.36	59.75
August	55.22	58.76	59.34
September	55.45	58.65	60.64
October	55.40	59.32	60.60
November	55.76	58.88	60.87
December	55.83	59.43	60.05

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	8.63	8.84
February	8.32	8.43	8.64	8.80
March	8.37	8.42	8.63	8.84
April	8.38	8.32	8.53	9.11
May	8.39	8.43	8.58	9.10
June	8.37	8.48	8.72	9.14
July	8.32	8.58	8.69
August	8.31	8.64	8.62
September	8.28	8.62	8.64
October	8.21	8.61	8.65
November	8.33	8.65	8.66
December	8.37	8.66	8.77

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	73.1	76.5	79.1
February	71.4	73.5	76.8	78.5
March	72.3	74.5	76.5	79.3
April	71.7	74.0	77.0	80.3
May	71.9	74.6	77.7	80.5
June	71.6	74.9	78.2	80.9
July	71.7	75.7	77.9
August	71.8	76.2	77.2
September	72.0	75.9	78.3
October	72.0	76.8	78.3
November	72.4	76.3	78.6
December	73.1	76.9	78.8

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	53.7	56.1
February	49.2	51.0	54.0	55.5
March	50.0	52.0	53.8	56.2
April	49.3	51.8	54.4	56.5
May	49.3	52.0	55.1	56.9
June	49.3	52.3	55.3	57.1
July	49.6	52.9	55.0
August	49.5	53.2	54.6
September	49.8	53.1	55.5
October	49.9	54.0	55.6
November	50.1	53.6	55.8
December	50.7	54.2	55.8

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	22.7	23.0
February	22.2	22.5	22.7	23.0
March	22.3	22.6	22.7	23.1
April	22.4	22.2	22.6	23.8
May	22.5	22.5	22.6	23.6
June	22.4	22.6	22.9	23.8
July	22.0	22.9	22.9
August	22.2	23.0	22.6
September	22.2	22.8	22.8
October	22.1	22.9	22.7
November	22.3	22.7	22.8
December	22.4	22.7	23.0

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	84.2	88.1	91.2	94.8
February	85.1	87.6	92.1	94.9
March	86.4	88.8	92.7	95.2
April	85.6	89.4	92.5	95.8
May	85.6	89.7	93.1	96.1
June	86.2	89.5	93.3	96.9
July	86.3	90.3	93.4
August	86.2	90.5	93.5
September	86.6	90.5	93.6
October	87.1	90.7	93.6
November	87.5	91.1	93.3
December	88.1	91.5	94.3

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	57.2	60.3	63.1	66.4
February	57.9	59.9	64.0	66.3
March	58.8	60.9	64.4	66.5
April	58.3	61.5	64.4	66.8
May	58.2	61.8	64.9	67.1
June	58.4	61.7	65.0	67.8
July	58.7	62.2	65.2
August	58.7	62.4	65.3
September	59.1	62.3	65.4
October	59.6	62.8	65.3
November	59.7	63.2	65.6
December	60.3	63.3	65.9

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	28.4
February	27.2	27.6	28.1	28.5
March	27.7	27.8	28.2	28.6
April	27.3	28.0	28.2	28.9
May	27.4	27.9	28.3	29.0
June	27.7	27.9	28.3	29.2
July	27.6	28.1	28.2
August	27.5	28.1	28.2
September	27.4	28.1	28.2
October	27.5	27.9	28.3
November	27.8	27.9	27.7
December	27.8	28.2	28.4

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	83.0	83.9	83.4
February	83.8	83.9	83.4	82.7
March	83.6	84.0	82.5	83.3
April	83.8	82.7	83.2	83.9
May	84.0	83.1	83.4	83.8
June	83.1	83.6	83.8	83.5
July	83.1	83.9	83.4
August	83.3	84.1	82.6
September	83.2	83.9	83.6
October	82.7	84.7	83.7
November	82.8	83.8	84.2
December	82.9	84.1	83.6

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 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	85.3	84.0	85.1	84.5
February	85.0	85.1	84.5	83.7
March	85.2	85.3	83.5	84.5
April	84.6	84.3	84.6	84.6
May	84.8	84.1	84.9	84.9
June	84.3	84.8	85.0	84.3
July	84.6	85.0	84.4
August	84.4	85.3	83.6
September	84.2	85.2	84.9
October	83.6	85.9	85.1
November	84.0	84.8	85.2
December	84.0	85.7	84.6

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	81.5	80.8	80.5
March	80.4	81.0	80.2	80.7
April	82.1	79.3	80.1	82.3
May	82.2	80.8	79.9	81.2
June	80.6	80.9	81.1	81.6
July	79.8	81.4	81.2
August	80.9	81.6	80.2
September	81.0	80.9	80.7
October	80.6	82.0	80.3
November	80.1	81.4	82.1
December	80.7	80.6	81.1

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).

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	62.60
February	52.44	54.16	58.49	58.35
March	66.44	68.20	70.56	72.69
April	63.49	65.92	67.24	70.20
May	66.51	68.93	71.51	73.61
June	68.60	71.27	74.50	76.94
July	71.89	75.63	76.88
August	69.53	72.87	73.45
September	59.99	63.74	66.47
October	64.49	68.73	69.54
November	59.74	64.59	66.59
December	63.78	66.40	66.93
6 Mo. Total	373.29	386.26	403.11	414.39
Yr. Total	762.71	798.22	822.97

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	54.09
February	45.51	47.17	51.11	51.05
March	57.76	59.56	61.59	63.69
April	55.25	57.70	58.89	61.04
May	57.89	60.25	62.75	64.38
June	59.26	61.81	64.75	66.68
July	61.76	65.13	66.13
August	59.76	62.77	63.50
September	52.53	55.99	58.62
October	57.08	60.89	61.71
November	52.58	57.15	59.27
December	55.49	57.87	58.22
6 Mo. Total	323.63	336.22	351.56	360.93
Yr. Total	662.83	696.02	719.01

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	7.38	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
August	9.77	10.09	9.95
September	7.46	7.75	7.86
October	7.41	7.84	7.83
November	7.16	7.44	7.32
December	8.29	8.53	8.71
6 Mo. Total	49.66	50.05	51.51	53.47
Yr. Total	99.88	102.20	103.93

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	64.2
March	73.6	75.8	78.7	80.6
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
August	81.2	85.2	86.1
September	68.4	72.5	75.3
October	71.3	76.1	77.3
November	65.2	70.0	72.2
December	71.8	74.8	77.0
6 Mo. Total	421.0	435.3	454.9	468.9
Yr. Total	862.5	902.2	933.5

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	58.5
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	62.3
August	54.6	57.8	59.3
September	46.3	49.9	52.7
October	50.1	54.1	55.3
November	46.4	50.9	53.3
December	50.3	53.1	54.8
6 Mo. Total	290.7	304.4	322.3	332.8
Yr. Total	595.3	630.7	660.0

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	22.0
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
August	26.6	27.4	26.9
September	22.1	22.6	22.7
October	21.2	22.0	22.0
November	18.8	19.1	18.9
December	21.5	21.7	22.2
6 Mo. Total	130.3	130.9	132.7	136.0
Yr. Total	267.2	271.6	273.5

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, 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	81.9	81.4
March	88.2	90.3	94.2	96.5
April	84.8	88.6	91.6	94.8
May	88.5	92.8	96.4	99.4
June	92.0	95.7	99.9	103.7
July	96.5	101.0	104.4
August	94.0	98.6	101.8
September	83.5	87.3	90.4
October	86.1	89.5	92.2
November	81.7	84.9	86.9
December	86.8	90.3	93.0
6 Mo. Total	505.8	525.3	550.3	565.8
Yr. Total	1,034.4	1,076.9	1,119.0

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	68.5
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
August	62.9	66.7	70.0
September	56.5	59.5	62.5
October	59.6	62.6	64.8
November	56.9	60.5	62.9
December	60.3	63.2	65.7
6 Mo. Total	343.6	360.9	382.8	395.6
Yr. Total	704.6	742.0	780.2

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
August	31.1	31.9	31.9
September	27.0	27.8	27.9
October	26.5	27.0	27.4
November	24.7	24.5	24.0
December	26.6	27.0	27.3
6 Mo. Total	162.2	164.6	167.6	170.1
Yr. Total	329.8	335.2	339.0

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	86.4
July	86.7	87.4	86.8
August	86.5	86.4	84.6
September	81.9	83.0	83.3
October	82.8	85.0	83.8
November	79.8	82.4	83.1
December	82.6	82.9	82.8
6 Mo. Value	83.2	82.9	82.7	82.9
Yr. Value	83.4	83.8	83.4

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	85.4
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	87.1
July	87.8	88.1	87.2
August	86.9	86.6	84.7
September	82.1	83.8	84.2
October	84.1	86.4	85.4
November	81.4	84.2	84.7
December	83.5	84.0	83.4
6 Mo. Value	84.6	84.4	84.2	84.1
Yr. Value	84.5	85.0	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
August	85.5	86.0	84.3
September	81.6	81.4	81.1
October	79.8	81.6	80.1
November	76.2	78.1	78.9
December	80.8	80.3	81.2
6 Mo. Value	80.3	79.5	79.2	79.9
Yr. Value	81.0	81.0	80.7

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).

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