Historical on-time performance
Salt Lake City to Ontario
558 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–ONT arrive on time 88% of the time over the last 12 months.
On-time rate88%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 999 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time96%Medianon timep90on timeCancel0.0%Flights140
- Delta Air LinesOn-time87%Medianon timep9015 minCancel0.5%Flights859
Why flights run late
Delay causes
- Airline63%
- Weather10%
- Air traffic (NAS)6%
- Late aircraft21%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SLC → ONT
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 94% on time.
- Mornings94% on time · p90 5 min · 154 flights · limited
- Afternoons90% on time · p90 10 min · 1,074 flights
- Middays87% on time · p90 15 min · 1,130 flights
- Overnights84% on time · p90 25 min · 1,100 flights
- Evenings74% on time · p90 80 min · 82 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 85% to 88% on time.
- Thursdays88% on time · p90 15 min · 524 flights
- Tuesdays88% on time · p90 20 min · 506 flights
- Fridays88% on time · p90 15 min · 513 flights
- Wednesdays88% on time · p90 15 min · 510 flights
- Saturdays87% on time · p90 15 min · 456 flights
- Sundays85% on time · p90 20 min · 517 flights
- Mondays85% on time · p90 15 min · 514 flights
Advertisement
Keep exploring