Airline Traffic Data

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March 2017 U.S. Airline Traffic Data

Release Number: 
BTS 29-17
Date: 
Thursday, June 15, 2017

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The U.S. Department of Transportation’s Bureau of Transportation Statistics (BTS) reported today that U.S. airlines’ March systemwide (domestic and international) scheduled service passenger enplanements rose 0.3 percent from February, rising to 69.6 million to reach a new all-time seasonally–adjusted high, after falling from January to February (Table 1).

Enplanements in Millions (Seasonally Adjusted)
Enplanements in millions (Seasonally Adjusted)
Jan-1462.8
Feb-1463.1
Mar-1463.9
Apr-1463.5
May-1463.5
Jun-1463.4
Jul-1463.7
Aug-1463.5
Sep-1463.8
Oct-1463.6
Nov-1464.1
Dec-1464.2
Jan-1564.8
Feb-1565.0
Mar-1565.6
Apr-1565.7
May-1566.0
Jun-1566.2
Jul-1567.0
Aug-1567.4
Sep-1567.3
Oct-1567.9
Nov-1567.5
Dec-1568.0
Jan-1667.5
Feb-1667.6
Mar-1667.0
Apr-1667.9
May-1668.9
Jun-1669.0
Jul-1668.5
Aug-1668.0
Sep-1669.3
Oct-1669.2
Nov-1669.5
Dec-1668.7
Jan-1769.4
Feb-1769.4
Mar-1769.6

From February 2017 to March 2017, enplanements on domestic flights increased 0.3 percent while enplanements on international flights to and from the U.S. also rose 0.3 percent, resulting in a 0.3 percent systemwide increase (Tables 1, 2, 3).

In one year, from March 2016 to March 2017, enplanements on domestic flights increased 4.1 percent while enplanements on international flights to and from the U.S rose 1.9 percent, resulting in a 3.8 percent systemwide increase (Tables 1, 2, 3).

In three years, from March 2014 to March 2017, enplanements on domestic flights increased 9.4 percent while international enplanements rose 5.0 percent, resulting in a 8.8 percent systemwide increase (Tables 1, 2, 3).

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

Trends (Percent changes based on unrounded numbers)
Seasonally-adjusted

Systemwide passenger enplanements (69.6 million) reached a new seasonally-adjusted all-time high, up 0.2 percent from the previous high in November 2016 (69.5 billion) (Table 1). Domestic passenger enplanements (60.8 million) were down 0.1 percent from the all-time seasonally-adjusted high (60.9 million) reached in November 2016 (Table 2). International passenger enplanements (8.77 million) were down 0.2 percent from the all-time seasonally-adjusted high (8.79 million) reached in January 2017 (Table 3).

Systemwide revenue passenger-miles (RPMs) (78.92 billion) reached a new seasonally-adjusted all-time high, up 0.1 percent from January 2017 (78.88 billion) (Table 4). Domestic RPMs (56.0 billion) reached a new seasonally-adjusted all-time high, up 0 percent from January 2017 (56.0 billion) (Table 5). International RPMs (22.9 billion) were down 0.6 percent from the all-time seasonally-adjusted high (23.0 billion) reached in June 2016 (Table 6).

Systemwide available seat-miles (ASMs) (94.8 billion) reached a new seasonally-adjusted all-time high, up 0.2 percent from January 2017 (94.7 billion) (Table 7). Domestic ASMs (66.4 billion) reached a new seasonally-adjusted all-time high, up less than 0.1 percent from January 2017 (66.3 billion) (Table 8). International ASMs (28.5 billion) reached a new seasonally-adjusted all-time high, up 0.3 percent from February 2017 (28.4 billion) (Table 9).

Systemwide load factor (83.2) was down 1.4 points from the all-time seasonally-adjusted high (84.6) reached in October 2015 (Table 10). Domestic load factor (84.4) was down 1.5 points from the all-time seasonally-adjusted high (85.9) reached in October 2015 (Table 11). International load factor (80.5) was down 2.8 points from the all-time seasonally-adjusted high (83.3) reached in March 2013 (Table 12).

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.

The seasonally-adjusted load factor rose from February (82.7 percent) to March (83.2 percent) because passenger travel increased more (0.8 percent rise in RPMs) than system capacity (0.2 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 (72.7 million) reached an all-time March high, up 3.0 percent from the previous high (70.6 million) reached in 2016 (Table 13). Domestic passenger enplanements (63.7 million) reached an all-time March high, up 3.4 percent from the previous high (61.6 million) reached in 2016 (Table 14). International passenger enplanements (9.00 million) reached an all-time March high, up 0.4 percent from the previous high (8.96 million) reached in 2016 (Table 15).

Systemwide RPMs (80.6 billion) reached an all-time March high, up 2.4 percent from the previous high (78.7 billion) reached in 2016 (Table 16). Domestic RPMs (58.5 billion) reached an all-time March high, up 3.2 percent from the previous high (56.7 billion) reached in 2016 (Table 17). International RPMs (22.03 billion) reached an all-time March high, up 0.2 percent from the previous high (21.98 billion) reached in 2016 (Table 18).

Systemwide ASMs (96.5 billion) reached an all-time March high, up 2.5 percent from the previous high (94.2 billion) reached in 2016 (Table 19). Domestic ASMs (68.5 billion) reached an all-time March high, up 3.1 percent from the previous high (66.5 billion) reached in 2016 (Table 20). International ASMs (28.0 billion) reached an all-time March high, up 1.2 percent from the previous high (27.7 billion) reached in 2016 (Table 21).

Systemwide load factor (83.5) was down 0.8 points from the all-time March high (84.3) reached in 2013 (Load Factor). Domestic load factor (85.4) was down 0.4 points from the all-time March high (85.8) reached in 2015 (Table 23). International load factor (78.7) was down 3.9 points from the all-time March high (82.5) reached in 2013 (Load Factor).

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 June 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 March, 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 March and international numbers through December 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 March, U.S. carriers reported 64,140 foreign point-to-point passengers. For January through March, U.S. carriers reported 180,437  foreign point-to-point passengers.

Data are subject to revision. BTS has scheduled July 14 for the release of April traffic data. None of the data are from samples so measures of statistical significance do not apply.

Seasonally-Adjusted Tables
Passenger Enplanements on U.S. Airlines, Seasonally-Adjusted (Tables 1-3)
Systemwide (Domestic + International) passenger enplanements (seasonally-adjusted) in millions (000,000), Scheduled service only
2014201520162017
January62.8164.7767.5469.42
February63.1064.9767.5969.40
March63.9465.5967.0269.58
April63.5165.7467.91
May63.5366.0168.92
June63.4066.2069.02
July63.6966.9668.48
August63.5567.4568.00
September63.7667.3069.30
October63.5867.9269.23
November64.0867.4969.47
December64.1568.0168.70
Source: 

Bureau of Transportation Statistics, T-100 Market

Domestic passenger enplanements on U.S. airlines (seasonally-adjusted) in millions (000,000), Scheduled service only
2014201520162017
January54.4956.3858.9560.63
February54.7856.5658.9960.65
March55.5857.1958.4160.80
April55.0957.3559.30
May55.1457.5760.30
June55.0357.7160.27
July55.3658.3859.76
August55.2258.7759.36
September55.4858.6860.66
October55.3959.3260.59
November55.7658.8860.87
December55.8059.3759.98
Source: 

Bureau of Transportation Statistics, T-100 Domestic Market

International passenger enplanements (seasonally-adjusted) in millions (000,000), Scheduled service only
2014201520162017
January8.328.408.598.79
February8.318.418.608.75
March8.368.408.618.77
April8.428.398.61
May8.408.448.62
June8.378.498.74
July8.338.598.72
August8.338.678.64
September8.298.628.64
October8.198.608.64
November8.328.618.61
December8.358.638.73
Source: 

Bureau of Transportation Statistics, T-100 International Market

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
2014201520162017
January71.073.076.378.9
February71.373.476.678.3
March72.174.376.378.9
April71.874.177.1
May72.074.777.8
June71.775.078.4
July71.775.878.0
August71.876.377.3
September72.075.978.3
October72.076.878.3
November72.476.278.5
December73.076.978.7
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

Domestic RPMs (seasonally-adjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January48.850.653.756.0
February49.151.054.055.4
March49.951.853.756.0
April49.351.854.4
May49.452.155.2
June49.352.455.4
July49.752.955.0
August49.653.254.6
September49.853.255.5
October49.954.055.6
November50.153.555.8
December50.754.255.7
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 (seasonally-adjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January22.222.422.622.9
February22.222.522.622.8
March22.222.522.622.9
April22.522.322.7
May22.622.622.6
June22.422.623.0
July22.122.923.0
August22.323.022.7
September22.222.822.8
October22.122.922.7
November22.222.722.7
December22.422.722.9
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

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
2014201520162017
January84.288.191.194.7
February85.087.591.994.6
March86.388.692.594.8
April85.689.492.5
May85.689.793.1
June86.289.793.6
July86.390.493.6
August86.290.693.7
September86.690.593.7
October87.190.893.6
November87.591.193.3
December88.191.494.2
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

Domestic ASMs (seasonally-adjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January57.260.363.166.3
February57.859.963.966.2
March58.760.964.466.4
April58.361.564.3
May58.261.864.8
June58.561.765.2
July58.762.265.3
August58.762.465.4
September59.262.465.4
October59.762.965.3
November59.763.265.6
December60.363.365.9
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

International ASMs (seasonally-adjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January27.027.828.028.4
February27.227.628.028.4
March27.627.828.128.5
April27.328.028.2
May27.527.928.3
June27.827.928.4
July27.628.128.3
August27.528.228.3
September27.428.228.3
October27.527.928.3
November27.827.927.7
December27.828.228.3
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

Load Factor on U.S. Airlines, Seasonally-Adjusted (Tables 10-12)
Systemwide (Domestic + International) RPMs/ASMs (both seasonally-adjusted) in percent, Scheduled service only
2014201520162017
January84.382.983.883.3
February83.984.083.482.7
March83.683.982.583.2
April83.982.883.4
May84.083.283.6
June83.183.683.8
July83.183.983.4
August83.384.282.6
September83.183.983.6
October82.684.683.6
November82.783.784.2
December82.984.183.5
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
2014201520162017
January85.384.085.184.4
February85.085.184.583.7
March85.085.183.484.4
April84.684.384.7
May84.984.385.2
June84.484.885.0
July84.685.084.3
August84.485.383.5
September84.285.284.9
October83.685.985.1
November84.084.785.1
December84.085.784.6
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
2014201520162017
January82.380.780.880.7
February81.581.580.880.4
March80.681.180.480.5
April82.379.680.5
May82.280.879.8
June80.680.981.2
July79.881.481.2
August80.981.780.3
September80.980.880.6
October80.581.980.3
November80.081.381.9
December80.580.580.9
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

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

Systemwide (Domestic + International) passenger enplanements (unadjusted) in millions (000,000), Scheduled service only
2014201520162017
January55.8157.7860.8162.60
February52.4454.1658.4958.35
March66.4468.2070.5672.69
April63.4965.9267.24
May66.5168.9371.51
June68.6071.2774.50
July71.8975.6376.88
August69.5372.8773.45
September59.9963.7466.47
October64.4968.7369.54
November59.7464.5966.59
December63.7866.4066.93
3 Mo. Total174.69180.14189.86193.64
Yr. Total762.71798.22822.97
Source: 

 Bureau of Transportation Statistics, T-100 Market

Domestic passenger enplanements (unadjusted) in millions (000,000), Scheduled service only
2014201520162017
January47.9649.7352.4754.09
February45.5147.1751.1151.05
March57.7659.5661.5963.69
April55.2557.7058.89
May57.8960.2562.75
June59.2661.8164.75
July61.7665.1366.13
August59.7662.7763.50
September52.5355.9958.62
October57.0860.8961.71
November52.5857.1559.27
December55.4957.8758.22
3 Mo. Total151.23156.46165.17168.83
Yr. Total662.83696.02719.01
Source: 

Bureau of Transportation Statistics, T-100 Domestic Market

International passenger enplanements (unadjusted) in millions (000,000), Scheduled service only
2014201520162017
January7.858.068.338.51
February6.937.007.387.30
March8.688.648.969.00
April8.248.228.34
May8.628.678.76
June9.349.469.74
July10.1310.5010.75
August9.7710.099.95
September7.467.757.86
October7.417.847.83
November7.167.447.32
December8.298.538.71
3 Mo. Total23.4623.7024.6724.81
Yr. Total99.88102.20103.93
Source: 

Bureau of Transportation Statistics, T-100 International Market

Revenue Passenger-Miles on U.S. Airlines, Unadjusted (Tables 16-18)
Systemwide (Domestic + International) RPMs (unadjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January64.166.069.371.4
February57.959.864.664.2
March73.675.878.780.6
April70.773.175.1
May75.278.080.8
June79.582.786.5
July83.788.390.6
August81.285.286.1
September68.472.575.3
October71.376.177.3
November65.270.072.2
December71.874.877.0
3 Mo. Total195.6201.5212.5216.2
Yr. Total862.5902.2933.5
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
2014201520162017
January43.645.148.150.1
February40.542.346.546.5
March51.953.956.758.5
April49.351.953.6
May51.554.357.1
June54.057.060.3
July56.960.462.4
August54.657.859.3
September46.349.952.7
October50.154.155.3
November46.450.953.3
December50.353.154.8
3 Mo. Total136.0141.3151.2155.1
Yr. Total595.3630.7660.0
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
2014201520162017
January20.520.821.221.3
February17.317.518.117.8
March21.821.822.022.0
April21.521.221.5
May23.723.823.7
June25.525.726.2
July26.827.828.3
August26.627.426.9
September22.122.622.7
October21.222.022.0
November18.819.118.9
December21.521.722.2
3 Mo. Total59.660.261.361.1
Yr. Total267.2271.6273.5
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
2014201520162017
January79.883.486.390.0
February72.574.581.981.4
March88.290.394.296.5
April84.888.691.6
May88.592.896.4
June92.095.799.9
July96.5101.0104.4
August94.098.6101.8
September83.587.390.4
October86.189.592.2
November81.784.986.9
December86.890.393.0
3 Mo. Total240.5248.2262.4267.9
Yr. Total1,034.41,076.91,119.0
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

Domestic ASMs (unadjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January54.057.059.763.1
February49.451.357.557.4
March60.762.966.568.5
April58.061.163.8
May59.763.466.5
June61.865.268.8
July64.868.671.5
August62.966.770.0
September56.559.562.5
October59.662.664.8
November56.960.562.9
December60.363.265.7
3 Mo. Total164.1171.2183.7189.0
Yr. Total704.6742.0780.2
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

International ASMs (unadjusted) in billions (000,000,000), Scheduled service only
2014201520162017
January25.826.426.726.9
February23.123.324.523.9
March27.527.527.728.0
April26.827.527.8
May28.829.429.8
June30.230.531.1
July31.732.432.9
August31.131.931.9
September27.027.827.9
October26.527.027.4
November24.724.524.0
December26.627.027.3
3 Mo. Total76.477.278.978.8
Yr. Total329.8335.2339.0
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

Load Factor on U.S. Airlines, Unadjusted (Tables 22-24)
Systemwide (Domestic + International) RPMs/ASMs (both unadjusted) in percent, Scheduled service only
2014201520162017
January80.379.180.279.4
February79.880.278.879.0
March83.583.983.683.5
April83.482.582.0
May85.084.183.8
June86.486.486.6
July86.787.486.8
August86.586.484.6
September81.983.083.3
October82.885.083.8
November79.882.483.1
December82.682.982.8
3 Mo. Value81.381.281.080.7
Yr. Value83.483.883.4
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
2014201520162017
January80.779.280.679.5
February82.182.480.880.9
March85.585.885.385.4
April84.984.984.1
May86.385.685.9
June87.487.487.6
July87.888.187.2
August86.986.684.7
September82.183.884.2
October84.186.485.4
November81.484.284.7
December83.584.083.4
3 Mo. Value82.982.682.482.1
Yr. Value84.585.084.6
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 unadjusted) in percent, Scheduled service only
2014201520162017
January79.678.879.579.2
February75.075.373.974.3
March79.279.579.478.7
April80.177.177.3
May82.380.879.3
June84.484.484.5
July84.485.886.0
August85.586.084.3
September81.681.481.1
October79.881.680.1
November76.278.178.9
December80.880.381.2
3 Mo. Value78.178.077.777.5
Yr. Value81.081.080.7
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