Seattle (SEA) Delays in 2025
78.6% on-time departures, 78.7% on-time arrivals in 2025
164,835Flights
78.6%Departures on-time
12.9 minAvg dep. delay
78.7%Arrivals on-time
13.5 minAvg arr. delay
0.8%Cancelled
Delay causes
- Air carrier40.6%
- Extreme weather3.8%
- National Aviation System23.7%
- Security0.3%
- Late-arriving aircraft31.6%
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On-time = arrival within 15 minutes of schedule, per U.S. DOT definitions. Source: Bureau of Transportation Statistics (public domain). Delay-cause attribution is reported by carriers since June 2003.