Historical on-time performance
Ontario to Salt Lake City
Flights on ONT–SLC arrive on time 91% of the time over the last 12 months.
based on 1,046 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- SkyWest AirlinesOn-time94%Medianon timep905 minCancel0.0%Flights140
- Delta Air LinesOn-time90%Medianon timep9010 minCancel1.2%Flights906
Why flights run late
Delay causes
- Airline44%
- Weather4%
- Air traffic (NAS)3%
- Late aircraft48%
- 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 11 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 → SLC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 88% to 94% on time.
- Mornings94% on time · p90 on time · 1,280 flights
- Afternoons92% on time · p90 5 min · 207 flights
- Evenings90% on time · p90 10 min · 944 flights
- Middays88% on time · p90 20 min · 1,156 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 88% to 94% on time.
- Tuesdays94% on time · p90 5 min · 508 flights
- Fridays92% on time · p90 5 min · 526 flights
- Wednesdays91% on time · p90 10 min · 510 flights
- Thursdays90% on time · p90 10 min · 539 flights
- Sundays89% on time · p90 10 min · 530 flights
- Saturdays89% on time · p90 5 min · 455 flights
- Mondays88% on time · p90 15 min · 519 flights
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