Historical delay and cancellation rates for 22 major US airports, with a live FAA, weather and ground-delay leaderboard that updates every hour. Delay window: January 2023 to December 2025. Cancellation window: 2024 to 2025. US network delay rate 21.2%, cancellation rate 1.41%.
What the BTS numbers show
Where delays are highest and lowest
FLL (27.3%), MIA (27.0%) and DFW (26.7%) have the highest rates among the 22 guide airports; SLC (16.7%), MSP (18.3%) and LAX (18.4%) have the lowest. Across all US domestic flights in the data, the rate is 21.2%.
Morning departures run on time more often
The delay rate for flights scheduled before 8 AM was lower than for flights after 8 PM at 22 of 22 airports. Averaged across airports, 11.5% of flights scheduled before 8 AM arrived late, against 29.0% after 8 PM.
Summer is the peak delay season
June to August holds the worst month at 21 of 22 airports, and July alone at 18. See the summer guide for the airport-by-airport table.
One airline often runs the airport
Delta Air Lines flies 69.1% of ATL departures, United Airlines flies 60.5% of IAH departures and American Airlines flies 59.6% of CLT departures. At airports like these, the airport's record largely follows one carrier's schedule.