SFO (San Francisco) to SEA (Seattle) flights arrive on time 77% of the time. The most reliable airline on this route is Delta Air Lines at 80%. The average delay is 46 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.SFO → SEA
SFO (San Francisco) to SEA (Seattle)
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SFO → SEA on-time performance by month
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This route is on time most of the time. About 77% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Delta Air Lines edges out JetBlue Airways on this route — 80% vs 74% on time.
Airline Comparison
Delta Air Lines leads at 80% on time; JetBlue Airways trails at 74%.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.