Bureau of Transportation Statistics (BTS)
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September 2005 Airline Traffic Data: Nine-Month Domestic Traffic Up 5.3 Percent From 2004

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Dave Smallen
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Thursday, December 15, 2005 - U.S. airlines carried 5.3 percent more domestic passengers and flew 1.2 percent more domestic flights during the first nine months of 2005 than they did during the same period in 2004, the U.S. Department of Transportation's Bureau of Transportation Statistics (BTS) today reported, in a release of preliminary data (Table 1).

BTS, a part of DOT's Research and Innovative Technology Administration (RITA), reported that the airlines carried 500.4 million domestic passengers during the first nine months of 2005, up from the 475.0 million carried between January and September 2004 (Table 2). The passengers were carried on 7.65 million flights, up 1.2 percent from the 7.55 million flights operated in 2004 (Table 1).

In other domestic comparisons from the first nine months of 2004 to the first nine months of 2005:

Revenue passenger miles, a measure of the number of passengers and the distance flown, were up 5.5 percent.

Available seat-miles, a measure of airline capacity, were up 1.8 percent.

Passenger load factor, passengers carried as a proportion of available seats, was up 2.6 load factor points.

Flight stage length, the average non-stop distance flown per departure, was up 1.7 percent.

Passenger trip length, the average distance flown per passenger, was 869 miles per trip, up only slightly from 868 the first nine months of 2004.

Among airlines, Southwest Airlines carried 66.2 million domestic passengers during the first nine months of 2005, the most of any airline (Table 3).

Among airports, Hartsfield-Jackson Atlanta International Airport was the busiest U.S. airport for domestic travel during the first nine months of 2005, with 29.6 million passenger boardings (Table 4).

September 2005 Airline Traffic

For the month of September 2005, U.S. airlines carried 50.7 million domestic passengers, 5.7 percent more than in September 2004 (Table 5).

These passengers were carried on 806,598 flights, down 2.8 percent from the 829,591 flights operated in September 2004.

In other month-to-month domestic comparisons from September 2004 to September 2005:

Revenue passenger miles, a measure of the number of passengers and the distance flown, were up 6.7 percent.

Available seat-miles, a measure of airline capacity, were up 1.4 percent.

Passenger load factor, passengers carried as a proportion of available seats, was up 3.7 load factor points.

Flight stage length, the average non-stop distance flown per departure, was up 4.4 percent.

Passenger trip length, the average distance flown per passenger, was up 0.9 percent.

Among airlines, Southwest Airlines carried 7.0 million domestic passengers during September, the most of any airline (Table 6).

Among airports, Hartsfield-Jackson International in Atlanta was the busiest U.S. airport for domestic travel during September, with 2.9 million passenger boardings (Table 7).

Additional airline traffic data can be found on the BTS website at TranStats, the Intermodal Transportation Database at http://transtats.bts.gov.  Click on "Aviation," then on "Air Carrier Statistics (Form 41 Traffic)," then click on "T-100 Domestic Market."

Data are compiled from monthly reports filed with BTS by commercial air carriers detailing operations, passenger traffic and freight traffic.  September traffic data are preliminary and include data received by BTS from 130 airlines as of Dec. 13.  Data are subject to revision.

Revised data from August 2005 and previous months are posted on the BTS website at http://transtats.bts.gov.  BTS will release October traffic data and revised data from September and previous months on Jan. 12. 

Table 1: Domestic Airline Travel January to September

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  Jan-Sept. 2004 Jan-Sept. 2005 Change
Passengers 474,999,570 500,366,248 5.3%
Flights 7,551,311 7,645,055 1.2%
Revenue Passenger Miles(000) 412,394,705 434,904,869 5.5%
Available Seat Miles(000) 550,843,960 560,971,299 1.8%
Load Factor 74.9 77.5 2.6 points
Flight Stage Length* 593 603 1.7%
Passenger Trip Length** 868 869 0.1%

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

* The average non-stop distance flown per departure in miles

** The average distance flown per passenger in miles

Table 2: Total Industry Domestic Enplanements

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Month 2003 2004 2005 2004-2005 Pct. Change
January 43,365,042 44,223,065 48,204,617 9.0%
February 41,480,320 45,726,295 47,327,802 3.5%
March 50,404,158 54,649,236 59,145,660 8.2%
April 47,380,661 53,740,731 55,244,677 2.8%
May 49,430,970 53,421,459 57,583,259 7.8%
June 52,562,332 57,381,300 60,001,374 4.6%
July 56,167,980 60,067,644 62,739,860 4.4%
August 54,347,183 57,793,104 59,387,946 2.8%
September 44,605,229 47,996,736 50,731,053 5.7%
October 50,372,738 54,582,605    
November 47,478,546 52,054,399    
December 50,146,795 52,923,041    
Annual Total 587,743,957 634,561,619    
Jan.-Sept. Total 439,743,875 474,999,570 500,366,248 5.3%

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

Table 3: Top 10 Airlines, ranked by January-September 2005 Domestic Enplanements

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Jan-Sept 2005 Rank Carrier Jan-Sept 2005 Passengers Jan-Sept 2004 Rank Jan-Sept 2004 Passengers
1 Southwest 66,191,678 1 60,954,558
2 Delta 60,512,266 2 59,493,659
3 American 58,326,385 3 54,663,177
4 United 41,473,808 4 45,590,457
5 Northwest 36,052,931 5 34,453,224
6 US Airways 29,042,430 6 28,203,578
7 Continental 24,463,264 7 23,547,756
8 America West 15,784,275 8 15,069,456
9 American Eagle 12,475,450 10 10,565,247
10 AirTran 12,156,299 11 9,634,028

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

Table 4: Top 10 Airports ranked by January-September 2005 Domestic Enplanements

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Jan-Sept 2005 Rank Airport Name Jan-Sept 2005 Passengers Jan-Sept 2004 Rank Jan-Sept 2004 Passengers
1 Hartsfield-Jackson Atlanta 29,565,661 1 28,144,620
2 Chicago O'Hare 23,483,818 2 23,337,238
3 Dallas-Ft. Worth 19,081,974 3 19,306,887
4 Los Angeles Int'l 16,086,044 4 16,082,157
5 Las Vegas McCarran 15,425,684 6 14,468,966
6 Denver 15,170,362 5 14,944,810
7 Phoenix Sky Harbor 14,607,535 7 13,900,898
8 Minneapolis-St.Paul 12,786,266 8 12,236,689
9 Detroit Metropolitan Wayne County 11,921,295 9 11,377,793
10 Orlando 11,749,327 10 10,664,262

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

Table 5: Domestic Airline Travel in September

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  Sept 2004 Sept 2005 Change
Passengers 47,996,736 50,731,053 5.7%
Flights 829,591 806,598 -2.8%
Revenue Passenger Miles(000) 40,985,292 43,740,864 6.7%
Available Seat Miles(000) 58,243,443 59,031,203 1.4%
Load Factor 70.4                74.1 3.7 points 
Flight Stage Length* 579 605 4.5%
Passenger Trip Length** 854 862 0.9%

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

* The average non-stop distance flown per departure in miles

** The average distance flown per passenger in miles

Table 6: Top 10 Airlines, ranked by September 2005 Domestic Enplanements

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Sept 2005 Rank Carrier Sept 2005 Passengers Sept 2004 Rank Sept 2004 Passengers
1 Southwest 6,991,028 1 6,128,380
2 American 5,906,868 3 5,326,779
3 Delta 5,611,032 2 5,609,903
4 United 4,340,049 4 4,805,982
5 Northwest 3,557,022 5 3,455,637
6 US Airways 2,643,120 6 2,732,847
7 Continental 2,366,756 7 2,267,568
8 America West 1,646,390 8 1,625,499
9 American Eagle 1,410,142 9 1,228,603
10 SkyWest 1,332,311 10 1,190,535

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

Table 7: Top 10 Airports ranked by September 2005 Domestic Enplanements

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Sept 2005 Rank Airport Name Sept 2005 Passengers Sept 2004 Rank Sept 2004 Passengers
1 Hartsfield-Jackson Atlanta 2,871,463 1 2,657,899
2 Chicago O'Hare 2,548,247 2 2,561,656
3 Dallas-Ft. Worth 2,001,639 3 1,990,584
4 Los Angeles Int'l 1,654,880 4 1,617,954
5 Las Vegas McCarran 1,644,724 5 1,566,456
6 Denver 1,613,489 6 1,553,272
7 Phoenix Sky Harbor 1,481,238 7 1,417,462
8 Minneapolis-St.Paul 1,307,466 8 1,244,026
9 Detroit Metropolitan Wayne County 1,236,799 9 1,194,433
10 Seattle-Tacoma 1,139,243 10 1,100,135

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