SEA (Seattle) to MSO (Missoula) flights arrive on time 74% of the time. The most reliable airline on this route is SkyWest Airlines at 75%. The average delay is 43 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.SEA → MSO
SEA (Seattle) to MSO (Missoula)
SEA → MSO on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is delayed fairly often. About 74% 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 — SkyWest Airlines leads slightly at 75% vs Alaska Airlines at 71%.
Airline Comparison
SkyWest Airlines leads at 75% on time; Alaska Airlines trails at 71%.
Accurate?
Good to know
Departing from SEA
80% on timeExpect ~21 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.
TSA is currently ~9 min. Best time: 4 AM (about 5 min).
Arriving at MSO
82% on timeWhen flights into MSO are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at MSO: TSA is ~26 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what SkyWest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of SEA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.