BTS | OT Delay

United States Department of Transportation

Airlines and Airports
Airline On-Time Statistics and Delay Causes
Delay Cause Definition Understanding Delay Data Database Tables Flight Delays at a Glance
Note: The numbers are for the marketing, reporting operating, and codeshare carriers from January 2018.

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Flight Delays by Cause National (August, 2024)
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A flight is considered delayed when it arrived 15 or more minutes than the schedule (see definitions in Frequently Asked Questions). 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 displayed numbers are rounded and may not add up to the total.

SOURCE: Bureau of Transportation Statistics, Airline Service Quality Performance 234