Historical on-time performance
Sacramento to Ontario
390 miData through May 2026Source: US DOT · BTS
Flights on SMF–ONT arrive on time 85% of the time over the last 12 months.
On-time rate85%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 2,110 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time85%Medianon timep9025 minCancel0.2%Flights2,110
Why flights run late
Delay causes
- Airline29%
- Weather0%
- Air traffic (NAS)5%
- Late aircraft65%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline80%
- Weather20%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 5 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SMF → ONT
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 94% on time.
- Mornings94% on time · p90 on time · 1,906 flights
- Middays88% on time · p90 15 min · 1,316 flights
- Afternoons83% on time · p90 25 min · 813 flights
- Evenings79% on time · p90 35 min · 1,214 flights
- Overnights73% on time · p90 50 min · 729 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 83% to 89% on time.
- Wednesdays89% on time · p90 15 min · 848 flights
- Tuesdays88% on time · p90 20 min · 854 flights
- Mondays87% on time · p90 20 min · 969 flights
- Saturdays86% on time · p90 20 min · 546 flights
- Fridays84% on time · p90 25 min · 975 flights
- Sundays83% on time · p90 25 min · 817 flights
- Thursdays83% on time · p90 30 min · 969 flights
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