International Business Tools

On-time performance of domestic flights

The U.S. Department of Transportation tracks the on-time performance of domestic flights operated by large air carriers. The data is available going back to 2003 and covers most major airports in the U.S.

Select a carrier:	Select an airport:	Period from:	Period to:

	Number of Operations	% of Total Operations	Delayed Minutes	% of Delayed Minutes
On Time	431198	70.84%	N/A	N/A
Air Carrier Delay	41260	6.78%	2482267	25.14%
Weather Delay	6925	1.14%	571832	5.79%
National Aviation System Delay	61857	10.16%	3226918	32.69%
Security Delay	294	0.05%	10614	0.11%
Aircraft Arriving Late	53921	8.86%	3580641	36.27%
Cancelled	10931	1.80%	N/A	N/A
Diverted	2276	0.37%	N/A	N/A
Total Operations	608665	100.00%	9872272	100.00%

A flight is considered delayed when it arrived 15 or more minutes than the schedule. Delayed minutes are calculated for delayed flights only. When multiple causes are assigned to one delayed flight, each cause is prorated based on delayed minutes it is responsible for. The diplayed numbers are rounded and may not add up to the total.

There is a fine line between some delays coded as "Weather" (extreme weather) and others coded as "National Aviation System" (non-extreme weather). The purpose of the two categories is to identify the party or organization in the best position to take corrective action. Delays or cancellations coded "Weather" (extreme weather) cannot be reduced by corrective action. Delays or cancellations coded "NAS" are the type of weather delays that could be reduced with corrective action by the airports or the FAA. Therefore, delays attributed to deicing are coded as "Weather" delays.

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