SMF (Sacramento) to SEA (Seattle) flights arrive on time 82% of the time. The most reliable airline on this route is Delta Air Lines at 100%. The average delay is 50 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.SMF → SEA
SMF (Sacramento) to SEA (Seattle)
SMF → SEA on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is on time most of the time. About 82% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Delta Air Lines is significantly more reliable on this route at 100% on time vs Alaska Airlines at 79%.
Airline Comparison
Delta Air Lines leads at 100% on time; Alaska Airlines trails at 79%.
Accurate?
Good to know
Departing from SMF
82% on timeTSA 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 ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines owes you — refund rights, action plan, complaint email. Free.
Free flight briefing
Know before you go
Flying SMF → SEA? We'll brief you before takeoff.
Delay riskDOT stats + live data
TSA waitCurrent checkpoint lines
WeatherBoth airports
Gate & terminalLive updates
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated March 2026. Source: Bureau of Transportation Statistics.