Airline Traffic Data

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January 2016 U.S. Airline Traffic Data

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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 – a measure of the use of airline capacity – fell to 83.9 percent in January, seasonally adjusted, falling after a single month of growth from November 2015 to December 2015 (Table 1). Seasonal adjustment allows the comparing of monthly load factors to all other months.

Load Factor on All U.S. Scheduled Airlines (Domestic & International),
January 2011 -January 2016

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Load Factor on All U.S. Scheduled Airlines (Domestic & International), January 2011 -January 2016

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

The seasonally-adjusted load factor fell month-to-month as a result of a 0.5 percent decrease in RPMs from December to January combined with a smaller 0.1 percent decline in ASMs (Tables 4, 7).

Trends:
Seasonally-adjusted
Systemwide load factor (83.9) was down 1 point from the all-time seasonally-adjusted high (84.9) reached in October 2015 (Table 1). Domestic load factor (85.1) was down 1.2 points from the all-time seasonally-adjusted high (86.3) reached in October 2015 (Table 2). International load factor (81.2) was down 2 points from the all-time seasonally-adjusted high (83.2) reached in March 2013 (Table 3).
           
Systemwide RPMs (76.5 billion) were down 0.5 percent from the all-time seasonally-adjusted high reached in October 2015 (Table 4). Domestic RPMs (53.8 billion) were down 0.6 percent from the all-time seasonally-adjusted high reached in December 2015 (Table 5). International RPMs (22.7 billion) were down 1.8 percent from the all-time seasonally-adjusted high reached in July 2015 (Table 6).

Systemwide ASMs (91.2 billion) were down 0.1 percent from the all-time seasonally-adjusted high reached in December 2015 (Table 7). Domestic ASMs (63.2 billion) reached a new seasonally-adjusted all-time high, up 0.1 percent from the previous high in December 2015 (Table 8). International ASMs (28.0 billion) were down 0.9 percent from the all-time seasonally-adjusted high reached in August 2015 (Table 9).

Systemwide passenger enplanements (67.6 million) were down 0.9 percent from the all-time seasonally-adjusted high reached in October 2015 (Table 10). Domestic passenger enplanements (59.0 million) were down 1.1 percent from the all-time seasonally-adjusted high reached in October 2015 (Table 11). International passenger enplanements (8.6 million) were down 0.3 percent from the all-time seasonally-adjusted high reached in December 2015 (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  page.

Unadjusted
Systemwide load factor (80.2) was down 0.1 points from the all-time January high reached in 2014 (Table 13). Domestic load factor (80.6) was down 0.1 points from the all-time January high reached in 2014 (Table 14). International load factor (79.5) was down 0.1 points from the all-time January high reached in 2014 (Table 15).
           
Systemwide RPMs (69.3 billion) reached an all-time January high, up 5.0 percent from the previous high reached in 2015 (Table 16). Domestic RPMs (48.1 billion) reached an all-time January high, up 6.5 percent from the previous high reached in 2015 (Table 17). International RPMs (21.2 billion) reached an all-time January high, up 1.7 percent from the previous high reached in 2015 (Table 18).

Systemwide ASMs (86.3 billion) reached an all-time January high, up 0.6 percent from previous high reached in 2008 (Table 19). Domestic ASMs (59.7 billion) were down 1.6 percent from the all-time January high reached in 2008 (Table 20). International ASMs (26.6 billion) reached an all-time January high, up 0.8 percent from previous high reached in 2015 (Table 21).

Systemwide passenger enplanements (60.8 million) reached an all-time January high, up 5.2 percent from previous high reached in 2015 (Table 22). Domestic passenger enplanements (52.5 million) reached an all-time January high, up 5.2 percent from previous high reached in 2015 (Table 23). International passenger enplanements (8.3 million) reached an all-time January high, up 3.4 percent from previous high reached in 2015 (Table 24).

Unadjusted trends are for the time period January 1996 to present. Data are available at and can be downloaded from the  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 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 75 carriers as of April 5 for U.S. carrier scheduled civilian operations.

Go to 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

For additional scheduled service numbers for U.S. airlines, U.S. and foreign airlines, by airline and by airport, see , , , and .

Traffic numbers are available on the BTS website at TranStats, the Intermodal Transportation Database, at .  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 113,485foreign point-to-point passengers.

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

Seasonally-adjusted systemwide RPMs and ASMs have been revised from the previous release 

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

 2013201420152016
January83.484.383.083.9
February83.583.883.8 
March82.783.383.5 
April83.183.882.9 
May82.984.083.1 
June83.383.083.5 
July83.183.283.9 
August82.783.283.9 
September82.983.384.1 
October82.882.984.9 
November83.883.084.1 
December83.282.984.2 

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

 2013201420152016
January84.085.283.985.1
February83.984.884.9 
March82.584.684.6 
April83.884.584.4 
May83.184.984.3 
June83.784.484.7 
July83.284.584.8 
August82.884.485.1 
September83.284.485.6 
October83.284.086.3 
November84.784.385.2 
December83.783.985.7 

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).

Table 3. International Load Factor on U.S. Airlines, Seasonally-Adjusted

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

Scheduled service only

 2013201420152016
January82.182.380.981.2
February82.581.581.5 
March83.280.580.9 
April81.882.379.7 
May82.682.080.3 
June82.480.280.6 
July82.980.482.0 
August82.680.781.3 
September82.280.980.9 
October81.880.481.7 
November81.980.181.5 
December82.180.881.0 

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).

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

 2013201420152016
January69.571.073.176.5
February70.771.273.3 
March69.271.973.9 
April69.771.774.1 
May69.872.074.7 
June70.271.875.1 
July69.971.976.0 
August70.071.876.1 
September70.072.176.1 
October70.272.276.9 
November71.172.476.2 
December70.573.076.9 

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.

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

 2013201420152016
January48.148.850.753.8
February48.849.050.9 
March47.449.751.5 
April48.149.251.8 
May47.949.452.2 
June48.349.452.5 
July47.849.752.9 
August48.049.653.2 
September48.149.953.3 
October48.250.154.1 
November49.150.253.7 
December48.550.654.1 

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

 2013201420152016
January21.422.222.422.7
February21.922.122.4 
March21.722.222.4 
April21.722.522.3 
May21.922.522.5 
June21.922.422.7 
July22.022.223.1 
August22.122.222.9 
September21.922.222.8 
October22.122.122.8 
November22.022.222.5 
December22.022.422.8 

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 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

 2013201420152016
January83.384.288.191.2
February84.785.087.4 
March83.686.388.6 
April83.885.589.3 
May84.185.789.9 
June84.286.590.0 
July84.186.490.6 
August84.786.390.7 
September84.586.590.4 
October84.987.190.6 
November84.987.390.6 
December84.888.091.3 

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

 2013201420152016
January57.257.260.463.2
February58.257.859.9 
March57.558.760.9 
April57.458.261.3 
May57.658.261.9 
June57.658.561.9 
July57.558.862.4 
August57.958.762.5 
September57.859.162.3 
October57.959.662.7 
November58.059.663.0 
December58.060.363.2 

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

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

Scheduled service only

 2013201420152016
January26.127.027.728.0
February26.527.227.5 
March26.127.627.7 
April26.527.328.0 
May26.527.528.0 
June26.627.928.1 
July26.627.728.2 
August26.727.528.2 
September26.727.428.2 
October27.027.527.9 
November26.927.727.6 
December26.827.728.1 

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

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

Scheduled service only

 2013201420152016
January61.8162.8064.7767.61
February62.9462.9664.74 
March61.2763.7765.38 
April61.6763.4565.68 
May61.6463.5666.12 
June61.9963.4766.25 
July61.2963.6466.92 
August61.6263.5267.33 
September61.9563.8367.44 
October61.9763.8368.22 
November62.9564.1867.68 
December62.5664.1867.98 

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

 2013201420152016
January53.8754.4856.3758.98
February54.8654.6656.35 
March53.2455.4156.99 
April53.6755.0357.27 
May53.5855.1557.67 
June53.8655.0957.73 
July53.0955.2958.29 
August53.4155.2058.69 
September53.7755.5558.84 
October53.7455.6659.65 
November54.7355.8759.09 
December54.3155.8359.34 

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

 2013201420152016
January7.958.328.418.62
February8.098.308.39 
March8.038.368.39 
April8.008.428.40 
May8.078.408.45 
June8.138.388.52 
July8.198.358.63 
August8.218.318.64 
September8.188.278.60 
October8.238.188.57 
November8.238.318.59 
December8.258.358.64 

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

Table 13. Systemwide Load Factor on U.S. Airlines, Unadjusted

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

Scheduled service only

 2013201420152016
January78.980.379.180.2
February79.279.880.2 
March84.383.583.9 
April81.683.482.5 
May84.285.084.1 
June87.086.486.4 
July86.686.787.4 
August86.186.586.4 
September81.681.983.0 
October82.282.885.0 
November79.379.882.4 
December84.482.682.9 
1 Mo. Value78.980.379.180.2
Yr. Value83.183.483.880.2

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

 2013201420152016
January78.980.779.280.6
February80.882.182.4 
March85.085.585.8 
April82.884.984.9 
May84.986.385.6 
June87.087.487.4 
July86.587.888.1 
August85.586.986.6 
September80.982.183.8 
October82.784.186.4 
November80.181.484.2 
December85.183.584.0 
1 Mo. Value78.980.779.280.6
Yr. Value83.584.585.080.6

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

 2013201420152016
January78.879.678.879.5
February75.675.075.3 
March82.579.279.5 
April78.880.177.1 
May82.882.380.8 
June86.984.484.4 
July86.984.485.8 
August87.285.586.0 
September83.381.681.4 
October81.179.881.6 
November77.676.278.1 
December82.980.880.3 
1 Mo. Value78.879.678.879.5
Yr. Value82.381.081.079.5

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

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

Scheduled service only

 2013201420152016
January62.464.166.069.3
February57.557.959.8 
March72.273.675.8 
April67.870.773.1 
May73.075.278.0 
June77.979.582.7 
July81.383.788.3 
August79.381.285.2 
September66.668.472.5 
October69.171.376.1 
November63.065.270.0 
December70.471.874.8 
1 Mo. Total62.464.166.069.3
Yr. Total840.4862.5902.269.3

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

 2013201420152016
January42.743.645.148.1
February40.440.542.3 
March50.651.953.9 
April47.349.351.9 
May50.151.554.3 
June52.854.057.0 
July54.856.960.4 
August53.154.657.8 
September44.746.349.9 
October47.950.154.1 
November44.446.450.9 
December49.150.353.1 
1 Mo. Total42.743.645.148.1
Yr. Total577.9595.3630.648.1

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

 2013201420152016
January19.720.520.821.2
February17.217.317.5 
March21.621.821.8 
April20.521.521.2 
May22.923.723.8 
June25.025.525.7 
July26.526.827.8 
August26.226.627.4 
September21.922.122.6 
October21.221.222.0 
November18.618.819.1 
December21.221.521.7 
1 Mo. Total19.720.520.821.2
Yr. Total262.6267.2271.621.2

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

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

Scheduled service only

 2013201420152016
January79.279.883.486.3
February72.672.574.5 
March85.688.290.3 
April83.184.888.6 
May86.788.592.8 
June89.592.095.7 
July93.896.5101.0 
August92.294.098.6 
September81.583.587.3 
October84.086.189.5 
November79.581.784.9 
December83.486.890.3 
1 Mo. Total79.279.883.486.3
Yr. Total1,011.11,034.41,076.986.3

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

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

Scheduled service only

 2013201420152016
January54.154.057.059.7
February50.049.451.3 
March59.560.762.9 
April57.158.061.1 
May59.159.763.4 
June60.761.865.2 
July63.364.868.6 
August62.162.966.7 
September55.256.559.5 
October57.959.662.6 
November55.556.960.5 
December57.860.363.2 
1 Mo. Total54.154.057.059.7
Yr. Total692.3704.6742.059.7

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

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

Scheduled service only

 2013201420152016
January25.025.826.426.6
February22.723.123.3 
March26.127.527.5 
April26.026.827.5 
May27.628.829.4 
June28.830.230.5 
July30.531.732.4 
August30.131.131.9 
September26.327.027.8 
October26.126.527.0 
November24.024.724.5 
December25.626.627.0 
1 Mo. Total25.025.826.426.6
Yr. Total318.8329.8335.226.6

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 22. Systemwide Passenger Enplanements on U.S. Airlines, Unadjusted

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

Scheduled service only

 2013201420152016
January55.3555.8157.7860.80
February52.4952.4454.16 
March65.1066.4468.20 
April60.9863.4965.92 
May64.7966.5168.93 
June67.0868.6071.27 
July69.2271.8975.63 
August67.7369.5372.87 
September58.1959.9963.74 
October62.1664.4968.74 
November57.6059.7464.59 
December62.4963.7866.40 
1 Mo. Total55.3555.8157.7860.80
Yr. Total743.18762.71798.2360.80

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

 2013201420152016
January47.8247.9649.7352.46
February45.7445.5147.16 
March56.5757.7659.56 
April53.2355.2557.70 
May56.5657.8960.25 
June57.9959.2661.81 
July59.3161.7665.13 
August58.1259.7662.77 
September50.7752.5355.99 
October54.7157.0860.90 
November50.5452.5857.15 
December54.3355.4957.87 
1 Mo. Total47.8247.9649.7352.46
Yr. Total645.69662.83696.0252.46

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

 2013201420152016
January7.537.858.068.33
February6.756.937.00 
March8.538.688.64 
April7.758.248.22 
May8.228.628.67 
June9.089.349.46 
July9.9110.1310.50 
August9.619.7710.09 
September7.437.467.75 
October7.457.417.84 
November7.067.167.44 
December8.168.298.53 
1 Mo. Total7.537.858.068.33
Yr. Total97.4899.88102.208.33

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

Updated: Friday, December 15, 2017
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