U.S. Airline Industry Performance

January 2017 U.S. Airline Traffic Data

- The U.S. Department of Transportation’s Bureau of Transportation Statistics (BTS) reported today that U.S. airlines’ systemwide (domestic and international) scheduled service load factor fell to 83.3 percent in January, seasonally adjusted, falling for the second consecutive month).

The U.S. Department of Transportation’s Bureau of Transportation Statistics (BTS) reported today that U.S. airlines’ systemwide (domestic and international) scheduled service load factor fell to 83.3 percent in January, seasonally adjusted, falling for the second consecutive month).

Load Factor on All U.S. Scheduled Airlines (Domestic & International),

January 2012 - January 2017

Graph - Load Factor on All U.S. Scheduled Airlines (Domestic & International), January 2012 - January 2017

The seasonally-adjusted load factor declined from December (83.5) to January (83.3) because system capacity grew faster (0.6 percent increase in Available Seat-Miles (ASMs)) than the growth in passenger travel (0.3 percent increase in Revenue Passenger-Miles (RPMs)) (Tables 4, 7).

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.

Without adjusting for seasonal variability, systemwide passenger enplanements (62.5 million) reached an all-time January high, up 2.7 percent from the previous high (60.8 million) reached in 2016 (Table 22).

Trends:

Seasonally-adjusted

Systemwide load factor (83.3) was down 1.3 points from the all-time seasonally-adjusted high (84.6) reached in October 2015 (Table 1). Domestic load factor (84.3) was down 1.4 points from the all-time seasonally-adjusted high (85.7) reached in October 2015 (Table 2). International load factor (80.7) was down 2.5 points from the all-time seasonally-adjusted high (83.3) reached in March 2013 (Table 3).

            

Systemwide RPMs (79.0 billion) reached a new seasonally-adjusted all-time high, up 0.3 percent from the previous high in December 2016 (78.7 billion) (Table 4). Domestic RPM (56.1 billion) reached a new seasonally-adjusted all-time high, up 0.5 percent from the previous high in November 2016 (55.8 billion) (Table 5). International RPMs (22.9 billion) were down 0.7 percent from the all-time seasonally-adjusted high (23.0 billion) reached in June 2016 (Table 6).

Systemwide ASMs (94.9 billion) reached a new seasonally-adjusted all-time high, up 0.6 percent from the previous high in December 2016 (94.3 billion) (Table 7). Domestic ASMs (66.5 billion) reached a new seasonally-adjusted all-time high, up 0.8 percent from the previous high in December 2016 (66.0 billion) (Table 8). International ASMs (28.3 billion) were down 0.2 percent from the all-time seasonally-adjusted high (28.4 billion) reached in June 2016 (Table 9).

Systemwide passenger enplanements (69.3 million) were down 0.1 percent from the all-time seasonally-adjusted high (69.4 million) reached in November 2016 (Table 10). Domestic passenger enplanements (60.5 million) were down 0.4 percent from the all-time seasonally-adjusted high (60.8 million) reached in November 2016 (Table 11). International passenger enplanements (8.8 million) reached a new seasonally-adjusted all-time high, up 0.7 percent from December 2016 (8.7 million) (Table 12).

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 load factor (79.4) was down 0.9 points from the all-time January high (80.3) reached in 2014 (Table 13). Domestic load factor (79.5) was down 1.2 points from the all-time January high (80.7) reached in 2014 (Table 14). International load factor (79.2) was down 0.4 points from the all-time January high (79.6) reached in 2014 (Table 15).

            

Systemwide RPMs (71.4 billion) reached an all-time January high, up 3.1 percent from the previous high (69.3 billion) reached in 2016 (Table 16). Domestic RPMs (50.1 billion) reached an all-time January high, up 4.2 percent from the previous high (48.1 billion) reached in 2016 (Table 17). International RPMs (21.3 billion) reached an all-time January high, up 0.5 percent from the previous high (21.2 billion) reached in 2016 (Table 18).

Systemwide ASMs (89.9 billion) reached an all-time January high, up 4.1 percent from the previous high (86.3 billion) reached in 2016 (Table 19). Domestic ASMs (63.0 billion) reached an all-time January high, up 3.9 percent from the previous high (60.6 billion) reached in 2008 (Table 20). International ASMs (26.9 billion) reached an all-time January high, up 0.8 percent from the previous high (26.7 billion) reached in 2016 (Table 21).

Systemwide passenger enplanements (62.5 million) reached an all-time January high, up 2.7 percent from the previous high (60.8 million) reached in 2016 (Table 22). Domestic passenger enplanements (54.0 million) reached an all-time January high, up 2.8 percent from the previous high (52.5 million) reached in 2016 (Table 23). International passenger enplanements (8.5 million) reached an all-time January high, up 2.1 percent from the previous high (8.3 million) reached in 2016 (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

Seasonal adjustment allows the comparing of monthly load factors to all other months. 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 81 carriers as of April 10 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. airlines, U.S. and foreign airlines, by airline and by airport, see PassengersFlightsRevenue Passenger-MilesAvailable 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 January, 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 January and international numbers through October 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 January, U.S. carriers reported 60,490 foreign point-to-point passengers.

Data are subject to revision. BTS has scheduled May 11 for the release of February traffic data. None of the data are from samples so measures of statistical significance do not apply.

 

Seasonally-Adjusted Tables

Load Factor on U.S. Airlines, Seasonally-Adjusted (Tables 1-3)

 

TABLE 1. SYSTEMWIDE LOAD FACTOR ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 84.2 82.9 83.7 83.3
February 83.8 83.9 83.4  
March 83.6 83.9 82.6  
April 83.8 82.8 83.4  
May 84.1 83.2 83.6  
June 83.1 83.6 83.8  
July 83.1 83.9 83.4  
August 83.3 84.2 82.6  
September 83.2 83.9 83.6  
October 82.7 84.6 83.6  
November 82.8 83.7 84.1  
December 82.8 84.0 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 2. DOMESTIC LOAD FACTOR ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 85.1 83.9 85.0 84.3
February 84.9 85.1 84.6  
March 85.1 85.2 83.5  
April 84.5 84.3 84.7  
May 85.0 84.3 85.2  
June 84.4 84.9 85.0  
July 84.6 85.0 84.3  
August 84.4 85.3 83.6  
September 84.2 85.3 84.9  
October 83.7 85.7 85.0  
November 84.0 84.8 85.0  
December 83.9 85.6 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 3. INTERNATIONAL LOAD FACTOR ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 82.3 80.7 80.9 80.7
February 81.5 81.4 80.7  
March 80.6 81.0 80.4  
April 82.3 79.6 80.5  
May 82.2 80.8 79.8  
June 80.5 80.9 81.2  
July 79.8 81.5 81.3  
August 80.9 81.8 80.3  
September 80.9 80.9 80.6  
October 80.5 81.9 80.3  
November 80.0 81.3 81.9  
December 80.6 80.5 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).

 

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

 2014201520162017
January 71.0 73.1 76.5 79.0
February 71.2 73.4 76.6  
March 72.2 74.3 76.3  
April 71.7 74.1 77.1  
May 72.0 74.7 77.8  
June 71.7 75.0 78.4  
July 71.7 75.8 78.0  
August 71.8 76.3 77.3  
September 72.0 76.0 78.3  
October 72.0 76.8 78.3  
November 72.4 76.3 78.6  
December 73.0 76.9 78.7  

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

 2014201520162017
January 48.8 50.7 53.8 56.1
February 49.1 50.9 54.0  
March 49.9 51.8 53.7  
April 49.2 51.8 54.4  
May 49.4 52.1 55.1  
June 49.3 52.4 55.3  
July 49.6 52.9 55.0  
August 49.6 53.2 54.6  
September 49.8 53.2 55.5  
October 49.9 53.9 55.6  
November 50.2 53.6 55.8  
December 50.6 54.2 55.8  

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 6. INTERNATIONAL REVENUE PASSENGER-MILES (RPMS) ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 22.2 22.4 22.6 22.9
February 22.2 22.4 22.6  
March 22.2 22.5 22.6  
April 22.5 22.3 22.7  
May 22.6 22.6 22.6  
June 22.4 22.6 23.0  
July 22.1 22.9 23.0  
August 22.3 23.0 22.7  
September 22.2 22.8 22.8  
October 22.1 22.9 22.7  
November 22.2 22.7 22.7  
December 22.4 22.7 22.9  

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.

 

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

 2014201520162017
January 84.3 88.2 91.3 94.9
February 85.0 87.4 91.8  
March 86.3 88.6 92.4  
April 85.6 89.4 92.4  
May 85.6 89.7 93.1  
June 86.2 89.6 93.5  
July 86.3 90.4 93.6  
August 86.2 90.6 93.7  
September 86.6 90.5 93.7  
October 87.1 90.8 93.7  
November 87.5 91.1 93.4  
December 88.2 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

 2014201520162017
January 57.3 60.4 63.3 66.5
February 57.8 59.9 63.8  
March 58.7 60.8 64.2  
April 58.3 61.4 64.2  
May 58.1 61.8 64.7  
June 58.4 61.7 65.1  
July 58.7 62.2 65.2  
August 58.7 62.4 65.4  
September 59.2 62.4 65.4  
October 59.7 62.9 65.4  
November 59.7 63.2 65.7  
December 60.4 63.4 66.0  

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 9. INTERNATIONAL AVAILABLE SEAT-MILES (ASMS) ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 27.0 27.8 28.0 28.3
February 27.2 27.6 28.0  
March 27.6 27.8 28.1  
April 27.3 28.0 28.2  
May 27.5 27.9 28.4  
June 27.8 27.9 28.4  
July 27.6 28.1 28.3  
August 27.5 28.2 28.3  
September 27.4 28.2 28.3  
October 27.5 27.9 28.3  
November 27.8 27.9 27.7  
December 27.8 28.1 28.3  

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.

 

Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted (Tables 10-12)

 

TABLE 10. SYSTEMWIDE PASSENGER ENPLANEMENTS ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 62.81 64.78 67.56 69.34
February 63.07 64.91 67.54  
March 63.96 65.63 67.05  
April 63.51 65.75 67.94  
May 63.54 66.02 68.95  
June 63.41 66.21 69.03  
July 63.70 66.98 68.49  
August 63.55 67.45 68.01  
September 63.76 67.29 69.29  
October 63.59 67.92 69.24  
November 64.04 67.45 69.42  
December 64.16 68.01 68.69  

Source: Bureau of Transportation Statistics, T-100 Market

 

TABLE 11. DOMESTIC PASSENGER ENPLANEMENTS ON U.S. AIRLINES, SEASONALLY-ADJUSTED

Domestic passenger enplanements on U.S. airlines (seasonally-adjusted) in millions (000,000)

Scheduled service only

 2014201520162017
January 54.49 56.39 58.97 60.53
February 54.76 56.52 58.96  
March 55.61 57.24 58.46  
April 55.10 57.36 59.33  
May 55.15 57.59 60.33  
June 55.04 57.72 60.29  
July 55.37 58.38 59.77  
August 55.22 58.78 59.36  
September 55.47 58.67 60.65  
October 55.40 59.31 60.59  
November 55.72 58.83 60.81  
December 55.80 59.36 59.95  

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

 

TABLE 12. INTERNATIONAL PASSENGER ENPLANEMENTS ON U.S. AIRLINES, SEASONALLY-ADJUSTED

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

Scheduled service only

 2014201520162017
January 8.32 8.40 8.60 8.81
February 8.31 8.40 8.59  
March 8.36 8.39 8.60  
April 8.42 8.39 8.61  
May 8.39 8.44 8.62  
June 8.37 8.49 8.74  
July 8.33 8.59 8.72  
August 8.33 8.68 8.64  
September 8.29 8.63 8.64  
October 8.19 8.61 8.65  
November 8.32 8.62 8.62  
December 8.36 8.65 8.74  

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

 

Unadjusted Tables

Load Factor on U.S. Airlines, Unadjusted (Tables 13-15) 

 

TABLE 13. SYSTEMWIDE LOAD FACTOR ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 80.3 79.1 80.2 79.4
February 79.8 80.2 78.8  
March 83.5 83.9 83.6  
April 83.4 82.5 82.0  
May 85.0 84.1 83.8  
June 86.4 86.4 86.6  
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  
1 Mo. Value 80.3 79.1 80.2 79.4
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 14. DOMESTIC LOAD FACTOR ON U.S. AIRLINES, UNADJUSTED

Domestic RPMs/ASMs (both unadjusted) in percent

Scheduled service only

 2014201520162017
January 80.7 79.2 80.6 79.5
February 82.1 82.4 80.8  
March 85.5 85.8 85.3  
April 84.9 84.9 84.1  
May 86.3 85.6 85.9  
June 87.4 87.4 87.6  
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  
1 Mo. Value 80.7 79.2 80.6 79.5
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 15. INTERNATIONAL LOAD FACTOR ON U.S. AIRLINES, UNADJUSTED

International RPMs/ASMs (both unadjusted) in percent

Scheduled service only

 2014201520162017
January 79.6 78.8 79.5 79.2
February 75.0 75.3 73.9  
March 79.2 79.5 79.4  
April 80.1 77.1 77.3  
May 82.3 80.8 79.3  
June 84.4 84.4 84.5  
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  
1 Mo. Value 79.6 78.8 79.5 79.2
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).

 

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

 2014201520162017
January 64.1 66.0 69.3 71.4
February 57.9 59.8 64.6  
March 73.6 75.8 78.7  
April 70.7 73.1 75.1  
May 75.2 78.0 80.8  
June 79.5 82.7 86.5  
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  
1 Mo. Total 64.1 66.0 69.3 71.4
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

 2014201520162017
January 43.6 45.1 48.1 50.1
February 40.5 42.3 46.5  
March 51.9 53.9 56.7  
April 49.3 51.9 53.6  
May 51.5 54.3 57.1  
June 54.0 57.0 60.3  
July 56.9 60.4 62.4  
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  
1 Mo. Total 43.6 45.1 48.1 50.1
Yr. Total 595.3 630.7 660.0  

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 18. INTERNATIONAL REVENUE PASSENGER-MILES (RPMS) ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 20.5 20.8 21.2 21.3
February 17.3 17.5 18.1  
March 21.8 21.8 22.0  
April 21.5 21.2 21.5  
May 23.7 23.8 23.7  
June 25.5 25.7 26.2  
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  
1 Mo. Total 20.5 20.8 21.2 21.3
Yr. Total 267.2 271.6 273.5  

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.

 

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

 2014201520162017
January 79.8 83.4 86.3 89.9
February 72.5 74.5 81.9  
March 88.2 90.3 94.2  
April 84.8 88.6 91.6  
May 88.5 92.8 96.4  
June 92.0 95.7 99.9  
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  
1 Mo. Total 79.8 83.4 86.3 89.9
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

 2014201520162017
January 54.0 57.0 59.7 63.0
February 49.4 51.3 57.5  
March 60.7 62.9 66.5  
April 58.0 61.1 63.8  
May 59.7 63.4 66.5  
June 61.8 65.2 68.8  
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  
1 Mo. Total 54.0 57.0 59.7 63.0
Yr. Total 704.6 742.0 780.2  

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 21. INTERNATIONAL AVAILABLE SEAT-MILES (ASMS) ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 25.8 26.4 26.7 26.9
February 23.1 23.3 24.5  
March 27.5 27.5 27.7  
April 26.8 27.5 27.8  
May 28.8 29.4 29.8  
June 30.2 30.5 31.1  
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  
1 Mo. Total 25.8 26.4 26.7 26.9
Yr. Total 329.8 335.2 339.0  

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.

 

Passenger Enplanements on U.S. Airlines, Unadjusted (Tables 22-24)

 

TABLE 22. SYSTEMWIDE PASSENGER ENPLANEMENTS ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 55.81 57.78 60.81 62.47
February 52.44 54.16 58.49  
March 66.44 68.20 70.56  
April 63.49 65.92 67.24  
May 66.51 68.93 71.51  
June 68.60 71.27 74.50  
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  
1 Mo. Total 55.81 57.78 60.81 62.47
Yr. Total 762.71 798.22 822.97  

Source: Bureau of Transportation Statistics, T-100 Market

 

TABLE 23. DOMESTIC PASSENGER ENPLANEMENTS ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 47.96 49.73 52.47 53.96
February 45.51 47.17 51.11  
March 57.76 59.56 61.59  
April 55.25 57.70 58.89  
May 57.89 60.25 62.75  
June 59.26 61.81 64.75  
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 58.21  
1 Mo. Total 47.96 49.73 52.47 53.96
Yr. Total 662.83 696.02 719.00  

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

 

TABLE 24. INTERNATIONAL PASSENGER ENPLANEMENTS ON U.S. AIRLINES, UNADJUSTED

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

Scheduled service only

 2014201520162017
January 7.85 8.06 8.33 8.51
February 6.93 7.00 7.38  
March 8.68 8.64 8.96  
April 8.24 8.22 8.34  
May 8.62 8.67 8.76  
June 9.34 9.46 9.74  
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  
1 Mo. Total 7.85 8.06 8.33 8.51
Yr. Total 99.88 102.20 103.93  

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

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