DFW (Dallas) to SEA (Seattle) flights arrive on time 79% of the time. The most reliable airline on this route is Delta Air Lines at 82%. The average delay is 41 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.DFW → SEA
DFW (Dallas) to SEA (Seattle)
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DFW → SEA on-time performance by month
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This route is on time most of the time. About 79% 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 American Airlines on this route — 82% vs 77% on time.
Airline Comparison
Delta Air Lines leads at 82% on time; American Airlines trails at 77%.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.