STS (Santa Rosa) to SEA (Seattle) flights arrive on time 73% of the time. The most reliable airline on this route is SkyWest Airlines at 81%. The average delay is 59 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.STS → SEA
STS (Santa Rosa) to SEA (Seattle)
STS → SEA on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 73% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
SkyWest Airlines edges out Alaska Airlines on this route — 81% vs 68% on time.
Airline Comparison
SkyWest Airlines leads at 81% on time; Alaska Airlines trails at 68%.
Accurate?
Good to know
Departing from STS
82% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. STS has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at SEA
82% on timeWhen flights into SEA are late, the average delay is 57 minutes. Build buffer if you have ground plans.
If connecting at SEA: TSA is ~10 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.