ONT (Ontario) to SMF (Sacramento) flights arrive on time 88% of the time. The most reliable airline on this route is Frontier Airlines at 92%. The average delay is 54 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.ONT → SMF
ONT (Ontario) to SMF (Sacramento)
ONT → SMF on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is usually on time. About 88% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — Frontier Airlines leads slightly at 92% vs Southwest Airlines at 88%.
Airline Comparison
Frontier Airlines leads at 92% on time; Southwest Airlines trails at 88%.
Accurate?
Good to know
Departing from ONT
82% on timeTSA is currently ~13 min. Best time: 4 AM (about 5 min).
Arriving at SMF
82% on timeWhen flights into SMF are late, the average delay is 58 minutes. Build buffer if you have ground plans.
If connecting at SMF: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.