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Table 2 Monthly Summary of Tarmac Times Oct 2008- June 2009

Table 2 Monthly Summary of Tarmac Times Oct 2008- June 2009

Number and Percent of Flights with Tarmac Times of 3 Hours or More
For an explanation of the new reports, see New Tarmac Time Data Q&A

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  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 544,958 187 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 82 0.02 12 10 48 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

Source: Bureau of Transportation Statistics

* Includes one flight with two separate three-hour tarmac times. Northwest Flight 1491 on Jan. 28 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 three-hour Multiple Gate Departure and a three-hour Taxi-out. Table 12 of the DOT 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