ONT (Ontario) to STS (Santa Rosa) flights arrive on time 91% of the time. The most reliable airline on this route is SkyWest Airlines at 90%. The average delay is 80 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated July 2026.ONT → STS
ONT (Ontario) to STS (Santa Rosa)
ONT → STS on-time performance by month
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is usually on time. About 91% of flights arrive on schedule.
Delays on this route are most often caused by air traffic and busy airspace.
Accurate?
Accurate?
Good to know
Departing from ONT
82% on timeTSA is currently ~7 min. Best time: 4 AM (about 5 min).
Arriving at STS
79% on timeWhen flights into STS are late, the average delay is 63 minutes. Build buffer if you have ground plans.
If connecting at STS: TSA is ~5 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.
We'll keep an eye on your flight
Delays, TSA, weather, gates — we'll let you know if something matters.
Delay odds & gate info
TSA wait & weather
48-hour conditions check
When-to-leave timeline
Post-landing trip report
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated July 2026. Source: Bureau of Transportation Statistics.