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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Causes of National Aviation System Delays National (January, 2025)
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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.

SOURCE: Federal Aviation Administration OPSNET