Airline Traffic Data

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August 2016 U.S. Airline Traffic Data

Release Number: 
BTS 58-16

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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 82.4 percent in August, seasonally adjusted, falling to its lowest level since July 2012 with the second consecutive monthly decline (Table 1).

Load Factor (Seasonally Adjusted)
Aug-1182.3
Sep-1182.7
Oct-1183.1
Nov-1183.6
Dec-1182.3
Jan-1282.5
Feb-1282.2
Mar-1282.7
Apr-1283.0
May-1282.5
Jun-1282.6
Jul-1282.4
Aug-1282.9
Sep-1282.7
Oct-1284.3
Nov-1283.2
Dec-1283.2
Jan-1383.4
Feb-1383.4
Mar-1383.0
Apr-1383.1
May-1382.9
Jun-1383.3
Jul-1382.9
Aug-1382.7
Sep-1382.9
Oct-1382.7
Nov-1383.8
Dec-1383.1
Jan-1484.2
Feb-1483.8
Mar-1483.5
Apr-1483.7
May-1484.0
Jun-1483.1
Jul-1483.0
Aug-1483.3
Sep-1483.3
Oct-1482.8
Nov-1483.0
Dec-1482.9
Jan-1582.9
Feb-1583.9
Mar-1583.8
Apr-1582.8
May-1583.1
Jun-1583.5
Jul-1583.7
Aug-1584.1
Sep-1584.2
Oct-1584.7
Nov-1584.1
Dec-1584.1
Jan-1683.7
Feb-1683.4
Mar-1682.5
Apr-1683.3
May-1683.4
Jun-1683.6
Jul-1683.1
Aug-1682.4

The seasonally-adjusted load factor fell from July (83.1) to August (82.4) because passenger travel fell (0.7 percent decline in Revenue-Passenger-Miles (RPMs)) while system capacity rose to an all-time high (0.1 percent increase in Available Seat-Miles (ASMs)) (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.

Trends:
Seasonally-adjusted
Systemwide load factor (82.4) was down 2.3 points from the all-time seasonally-adjusted high (84.7) reached in October 2015 (Table 1). Domestic load factor (83.4) was down 2.7 points from the all-time seasonally-adjusted high (86.1) reached in October 2015 (Table 2). International load factor (80.0) was down 3.1 points from the all-time seasonally-adjusted high (83.1) reached in March 2013 (Table 3).
            
Systemwide RPMs (77.3 billion) were down 1.3 percent from the all-time seasonally-adjusted high (78.3 billion) reached in June 2016 (Table 4). Domestic RPMs (54.7 billion) were down 1.1 percent from the all-time seasonally-adjusted high (55.3 billion) reached in June 2016 (Table 5). International RPMs (22.6 billion) were down 1.8 percent from the all-time seasonally-adjusted high (23.0 billion) reached in June 2016 (Table 6).

Systemwide ASMs (93.8 billion) reached a new seasonally-adjusted all-time high, up 0.1 percent from July 2016 (93.7) (Table 7). Domestic ASMs (65.5 billion) reached a new seasonally-adjusted (65.3) all-time high, up 0.2 percent from July 2016 (Table 8). International ASMs (28.3 billion) were down 0.5 percent from the all-time seasonally-adjusted high (28.4 billion) reached in June 2016 (Table 9).

Systemwide passenger enplanements (67.9 million) were down 1.3 percent from the all-time seasonally-adjusted high (68.8 million) reached in June 2016 (Table 10). Domestic passenger enplanements (59.3 million) were down 1.5 percent from the all-time seasonally-adjusted high (60.2 million) reached in May 2016 (Table 11). International passenger enplanements (8.6 million) were down 1.4 percent from the all-time seasonally-adjusted high (8.7 million) reached in June 2016 (Table 12).

Seasonally-adjusted trends are for the time period January 2000 to present. Additional data can be found on the   page.

Unadjusted
Systemwide load factor (84.6) was down 1.9 points from the all-time August high (86.5) reached in 2012 (Table 13). Domestic load factor (84.7) was down 2.2 points from the all-time August high (86.9) reached in 2014 (Table 14). International load factor (84.3) was down 2.9 points from the all-time August high (87.2) reached in 2013 (Table 15). Systemwide, domestic and international load factors all dropped to their lowest August levels since 2008.
            
Systemwide RPMs (86.1 billion) reached an all-time August high, up 1.1 percent from the previous high (85.2 billion) reached in 2015 (Table 16). Domestic RPMs (59.3 billion) reached an all-time August high, up 2.5 percent from the previous high (57.8 billion) reached in 2015 (Table 17). International RPMs (26.9 billion) were down 2.1 percent from the all-time August high (27.4 billion) reached in 2015 (Table 18).

Systemwide ASMs (101.8 billion) reached an all-time August high, up 3.3 percent from the previous high (98.6 billion) reached in 2015 (Table 19). Domestic ASMs (70.0 billion) reached an all-time August high, up 4.8 percent from the previous high (66.7 billion) reached in 2015 (Table 20). International ASMs (31.9 billion) were virtually unchanged from the all-time August high (31.9 billion) reached in 2015 (Table 21).

Systemwide passenger enplanements (73.4 million) reached an all-time August high, up 0.8 percent from the previous high (72.9 million) reached in 2015 (Table 22). Domestic passenger enplanements (63.5 million) reached an all-time August high, up 1.1 percent from the previous high (62.8 million) reached in 2015 (Table 23). International passenger enplanements (9.9 million) were down 1.4 percent from the all-time August high (10.1 million) 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
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  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 Nov. 1 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 August, 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 August and international numbers through May 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 August, U.S. carriers reported 98,648 foreign point-to-point passengers. For January through August, U.S. carriers reported 839,510 foreign point-to-point passengers.

Data are subject to revision. BTS has scheduled Dec. 14 for the release of September 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)

Systemwide (Domestic + International) RPMs/ASMs (both seasonally-adjusted) in percent Scheduled service only
2013201420152016
January83.484.282.983.7
February83.483.883.983.4
March83.083.583.882.5
April83.183.782.883.3
May82.984.083.183.4
June83.383.183.583.6
July82.983.083.783.1
August82.783.384.182.4
September82.983.384.2
October82.782.884.7
November83.883.084.1
December83.182.984.1
Notes: 

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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic RPMs/ASMs (both seasonally-adjusted) in percent Scheduled service only
2013201420152016
January84.085.283.884.9
February83.984.985.184.5
March83.085.085.183.4
April83.684.484.284.6
May83.184.984.285.0
June83.784.384.784.7
July83.284.584.784.0
August82.884.585.283.4
September83.284.485.6
October83.183.986.1
November84.784.285.2
December83.683.985.6
Notes: 

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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

International RPMs/ASMs (both seasonally-adjusted) in percent Scheduled service only
2013201420152016
January82.282.380.880.9
February82.581.581.580.8
March83.180.481.080.3
April81.882.379.680.4
May82.682.180.779.7
June82.680.580.881.0
July82.479.881.481.1
August82.780.881.580.0
September82.281.081.0
October81.980.481.7
November82.180.281.7
December82.180.780.8
Notes: 

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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) RPMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January69.571.073.176.5
February70.771.273.476.6
March69.572.174.376.2
April69.671.774.077.1
May69.771.974.677.7
June70.171.774.978.3
July69.771.775.777.9
August70.071.876.277.3
September70.072.176.1
October70.272.176.8
November71.272.476.3
December70.573.076.9
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic RPMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January48.148.850.753.8
February48.849.150.954.0
March47.749.951.853.6
April48.049.251.854.4
May47.849.452.055.1
June48.249.352.355.3
July47.849.652.854.9
August47.949.653.354.7
September48.149.953.3
October48.150.054.0
November49.150.253.7
December48.550.654.1
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

International RPMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January21.522.222.422.7
February21.922.222.422.6
March21.822.222.522.6
April21.622.522.322.7
May21.922.522.622.6
June21.922.422.623.0
July21.922.122.923.0
August22.122.223.022.6
September21.922.222.8
October22.122.122.8
November22.122.222.6
December22.022.422.7
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) ASMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January83.484.388.391.4
February84.785.087.491.9
March83.786.488.692.4
April83.885.689.492.5
May84.185.689.893.2
June84.286.389.793.6
July84.086.390.593.7
August84.686.290.793.8
September84.586.690.5
October84.987.190.7
November84.987.390.7
December84.888.191.4
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic ASMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January57.357.360.563.4
February58.257.859.963.9
March57.558.760.864.3
April57.458.361.564.3
May57.658.261.864.8
June57.658.561.865.2
July57.558.762.365.3
August57.958.762.565.5
September57.859.162.3
October57.959.662.7
November58.059.663.1
December58.060.363.3
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

International ASMs (seasonally-adjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January26.127.027.828.0
February26.527.227.528.0
March26.227.627.828.1
April26.527.328.028.2
May26.527.527.928.4
June26.527.828.028.4
July26.627.628.128.4
August26.727.528.228.3
September26.727.428.2
October27.027.528.0
November26.927.727.7
December26.827.828.2
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) passenger enplanements (seasonally-adjusted) in millions (000,000) Scheduled service only
2013201420152016
January61.8062.8064.7667.56
February63.0063.0664.8967.48
March61.4863.9665.6267.00
April61.6263.4665.6867.83
May61.6063.4665.9268.82
June61.8963.2866.0268.83
July61.2763.5866.8168.30
August61.6463.5667.4367.93
September61.9263.8667.50
October61.9563.8268.23
November62.9664.1667.67
December62.5564.1767.97
Source: 

Bureau of Transportation Statistics, T-100 Market

Domestic passenger enplanements on U.S. airlines (seasonally-adjusted) in millions (000,000) Scheduled service only
2013201420152016
January53.8554.4856.3558.94
February54.9054.7556.4858.87
March53.4555.6057.2258.39
April53.6155.0457.2859.21
May53.5455.0757.4860.19
June53.7754.9157.5360.09
July53.0955.2658.2359.59
August53.4355.2458.7759.31
September53.7455.5858.89
October53.7155.6459.64
November54.7355.8559.07
December54.2955.8159.31
Source: 

Bureau of Transportation Statistics, T-100 Domestic Market

International passenger enplanements (seasonally-adjusted) in millions (000,000) Scheduled service only
2013201420152016
January7.948.328.418.62
February8.108.318.418.61
March8.038.368.408.61
April8.018.428.408.62
May8.068.408.448.63
June8.138.378.498.74
July8.188.338.598.71
August8.218.328.668.62
September8.188.298.62
October8.238.188.59
November8.238.318.60
December8.268.368.65
Source: 

Bureau of Transportation Statistics, T-100 International Market

Unadjusted Tables

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

Systemwide (Domestic + International) RPMs/ASMs (both unadjusted) in percent Scheduled service only
2013201420152016
January78.980.379.180.2
February79.279.880.278.8
March84.383.583.983.6
April81.683.482.582.0
May84.285.084.183.8
June87.086.486.486.6
July86.686.787.486.8
August86.186.586.484.6
September81.681.983.0
October82.282.885.0
November79.379.882.4
December84.482.682.9
8 Mo. Value83.784.284.083.5
Yr. Value83.183.483.8
Notes: 

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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic RPMs/ASMs (both unadjusted) in percent Scheduled service only
2013201420152016
January78.980.779.280.6
February80.882.182.480.8
March85.085.585.885.3
April82.884.984.984.1
May84.986.385.685.9
June87.087.487.487.6
July86.587.888.187.2
August85.586.986.684.7
September80.982.183.8
October82.784.186.4
November80.181.484.2
December85.183.584.0
8 Mo. Value84.185.485.284.7
Yr. Value83.584.585.0
Notes: 

 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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

International RPMs/ASMs (both unadjusted) in percent Scheduled service only
2013201420152016
January78.879.678.879.5
February75.675.075.373.9
March82.579.279.579.4
April78.880.177.177.3
May82.882.380.879.3
June86.984.484.484.5
July86.984.485.886.0
August87.285.586.084.3
September83.381.681.4
October81.179.881.6
November77.676.278.1
December82.980.880.3
8 Mo. Value82.881.681.380.8
Yr. Value82.381.081.0
Notes: 

 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).

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) RPMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January62.464.166.069.3
February57.557.959.864.6
March72.273.675.878.7
April67.870.773.175.1
May73.075.278.080.8
June77.979.582.786.5
July81.383.788.390.6
August79.381.285.286.1
September66.668.472.5
October69.171.376.1
November63.065.270.0
December70.471.874.8
8 Mo. Total571.4585.9608.8631.7
Yr. Total840.4862.5902.2
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic RPMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January42.743.645.148.1
February40.440.542.346.5
March50.651.953.956.7
April47.349.351.953.6
May50.151.554.357.1
June52.854.057.060.3
July54.856.960.462.4
August53.154.657.859.3
September44.746.349.9
October47.950.154.1
November44.446.450.9
December49.150.353.1
8 Mo. Total391.8402.2422.7443.9
Yr. Total577.9595.3630.7
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

International RPMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January19.720.520.821.2
February17.217.317.518.1
March21.621.821.822.0
April20.521.521.221.5
May22.923.723.823.7
June25.025.525.726.2
July26.526.827.828.3
August26.226.627.426.9
September21.922.122.6
October21.221.222.0
November18.618.819.1
December21.221.521.7
8 Mo. Total179.6183.7186.1187.8
Yr. Total262.6267.2271.6
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) ASMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January79.279.883.486.3
February72.672.574.581.9
March85.688.290.394.2
April83.184.888.691.6
May86.788.592.896.4
June89.592.095.799.9
July93.896.5101.0104.4
August92.294.098.6101.8
September81.583.587.3
October84.086.189.5
November79.581.784.9
December83.486.890.3
8 Mo. Total682.7696.3724.9756.5
Yr. Total1,011.11,034.41,076.9
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

Domestic ASMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January54.154.057.059.7
February50.049.451.357.5
March59.560.762.966.5
April57.158.061.163.8
May59.159.763.466.5
June60.761.865.268.8
July63.364.868.671.5
August62.162.966.770.0
September55.256.559.5
October57.959.662.6
November55.556.960.5
December57.860.363.2
8 Mo. Total465.9471.3496.2524.3
Yr. Total692.3704.6742.0
Notes: 

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.

Source: 

 Bureau of Transportation Statistics, T-100 Segment

International ASMs (unadjusted) in billions (000,000,000) Scheduled service only
2013201420152016
January25.025.826.426.7
February22.723.123.324.5
March26.127.527.527.7
April26.026.827.527.8
May27.628.829.429.8
June28.830.230.531.1
July30.531.732.432.9
August30.131.131.931.9
September26.327.027.8
October26.126.527.0
November24.024.724.5
December25.626.627.0
8 Mo. Total216.8225.0228.9232.4
Yr. Total318.8329.8335.2
Notes: 

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.

Source: 

Bureau of Transportation Statistics, T-100 Segment

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

Systemwide (Domestic + International) passenger enplanements (unadjusted) in millions (000,000) Scheduled service only
2013201420152016
January55.3555.8157.7860.81
February52.4952.4454.1658.49
March65.1066.4468.2070.56
April60.9863.4965.9267.23
May64.7966.5168.9371.52
June67.0868.6071.2774.50
July69.2271.8975.6376.89
August67.7369.5372.8773.43
September58.1959.9963.74
October62.1664.4968.73
November57.6059.7464.59
December62.4963.7866.40
8 Mo. Total502.74514.71534.76553.43
Yr. Total743.18762.71798.22
Source: 

Bureau of Transportation Statistics, T-100 Market

Domestic passenger enplanements (unadjusted) in millions (000,000) Scheduled service only
2013201420152016
January47.8247.9649.7352.47
February45.7445.5147.1751.11
March56.5757.7659.5661.59
April53.2355.2557.7058.89
May56.5657.8960.2562.75
June57.9959.2661.8164.76
July59.3161.7665.1366.14
August58.1259.7662.7763.48
September50.7752.5355.99
October54.7157.0860.89
November50.5452.5857.15
December54.3355.4957.87
8 Mo. Total435.34445.15464.12481.19
Yr. Total645.69662.83696.02
Source: 

Bureau of Transportation Statistics, T-100 Domestic Market

International passenger enplanements (unadjusted) in millions (000,000) Scheduled service only
2013201420152016
January7.537.858.068.33
February6.756.937.007.38
March8.538.688.648.96
April7.758.248.228.34
May8.228.628.678.76
June9.089.349.469.74
July9.9110.1310.5010.75
August9.619.7710.099.95
September7.437.467.75
October7.457.417.84
November7.067.167.44
December8.168.298.53
8 Mo. Total67.3869.5670.6472.21
Yr. Total97.4899.88102.20
Source: 

Bureau of Transportation Statistics, T-100 International Market

Updated: Monday, February 13, 2017
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