Table 1-4-12 - Monthly Summary of Tarmac Times Over 3 Hours: October 2008-April 2010

Table 1-4-12 - Monthly Summary of Tarmac Times Over 3 Hours: October 2008-April 2010

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Number and Percent of Flights with Tarmac Times of 3 Hours or More

  Number of regularly scheduled flights Tarmac times of 3 hours or longer Stage of operation of the 3-hour tarmac time
Total Percent Prior to cancellation Multiple gate departure Taxi-out Taxi-in At diversion airport
Oct 2008 556,205 49 0.01 2 6 35 0 6
Nov 2008 523,272 7 0.00 0 1 4 0 2
Dec 2008 544,956 187 0.03 40 14 116 7 10
Jan 2009 532,339 87 0.02 7 10 70 0 0
Feb 2009 488,410 43 0.01 5 4 34 0 0
Mar 2009 557,422 88 0.02 6 9 66 0 7
Apr 2009 537,793 81 0.02 12 10 47 0 12
May 2009 546,832 35 0.01 7 2 25 1 0
June 2009 557,594 278 0.05 40 42 172 1 23
July 2009 580,134 164 0.03 21 20 105 0 18
Aug 2009 568,301 70 0.01 7 11 45 0 7
Sep 2009 510,852 6 0.00 0 0 4 0 2
Oct 2009 531,799 12 0.00 0 0 12 0 0
Nov 2009 509,540 4 0.00 0 1 2 0 1
Dec 2009 529,269 35 0.01 5 3 22 0 5
Jan 2010 521,809 21 0.00 2 3 11 2 3
Feb 2010 481,988 61 0.00 5 1 53 1 1
Mar 2010 548,282 25 0.00 9 2 11 1 2
Apr 2010 529,330 4 0.00 0 0 1 0 3

NOTE: January 2009 includes one flight with two separate 3-hour tarmac times. Northwest Flight 1491 on Jan. 28, 2009 was on the tarmac for 188 minutes before returning to the gate. The flight departed the gate a second time and was on the tarmac for 199 minutes before wheels-off. Details of the flight are listed as a 3-hour multiple gate departure and a 3-hour Taxi-out. Table 12 of the Air Travel Consumer Report lists number of flights with three-hour tarmac times and counts NW Flight 1491 as a single flight.

Explanation of Stage of Operation

Prior to cancellation: Flight left the gate but was cancelled at the origin airport.

Multiple gate departure: Flight left the gate, then returned and then left again to resume normal operation. Tarmac time is the time before the return to the gate.

Taxi-out: The time between gate departure and wheels-off.

Taxi-in: The time between wheels-on and gate arrival.

At diversion airport: The tarmac time at the alternate airport.

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, Tarmac Times, available at http://www.bts.gov/ as of July 2010.