Historical on-time performance
Ontario to Sacramento
390 miData through May 2026Source: US DOT · BTS
Flights on ONT–SMF arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 2,108 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time86%Medianon timep9020 minCancel0.2%Flights2,108
Why flights run late
Delay causes
- Airline21%
- Weather0%
- Air traffic (NAS)2%
- Late aircraft76%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- 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 ONT → SMF
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 — 96% on time.
- Mornings96% on time · p90 on time · 1,926 flights
- Middays88% on time · p90 15 min · 1,386 flights
- Afternoons81% on time · p90 30 min · 875 flights
- Evenings78% on time · p90 35 min · 1,243 flights
- Overnights77% on time · p90 55 min · 517 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 90% on time.
- Tuesdays90% on time · p90 10 min · 845 flights
- Wednesdays90% on time · p90 10 min · 839 flights
- Saturdays88% on time · p90 20 min · 537 flights
- Mondays86% on time · p90 20 min · 968 flights
- Thursdays86% on time · p90 20 min · 967 flights
- Fridays85% on time · p90 25 min · 972 flights
- Sundays81% on time · p90 30 min · 819 flights
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