SEA (Seattle) to MCI (Kansas City) flights arrive on time 78% of the time. The most reliable airline on this route is Delta Air Lines at 79%. The average delay is 52 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.SEA → MCI
SEA (Seattle) to MCI (Kansas City)
SEA → MCI on-time performance by month
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This route is on time most of the time. About 78% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Airlines are roughly equal on this route — Delta Air Lines leads slightly at 79% vs Alaska Airlines at 79%.
Airline Comparison
Delta Air Lines leads at 79% on time; Alaska Airlines trails at 79%.
Accurate?
Good to know
Departing from SEA
82% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.
TSA is currently ~10 min. Best time: 4 AM (about 5 min).
Arriving at MCI
81% on timeWhen flights into MCI are late, the average delay is 65 minutes. Build buffer if you have ground plans.
If connecting at MCI: TSA is ~22 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.