Historical on-time performance
Las Vegas to Ontario
197 miData through May 2026Source: US DOT · BTS
Flights on LAS–ONT arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 2,484 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Frontier AirlinesbestOn-time81%Medianon timep9045 minCancel1.0%Flights720
- Southwest AirlinesOn-time74%Medianon timep9040 minCancel0.7%Flights1,764
Why flights run late
Delay causes
- Airline29%
- Weather2%
- Air traffic (NAS)7%
- Late aircraft63%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline42%
- Weather11%
- Air traffic (NAS)47%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 19 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 LAS → 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 — 91% on time.
- Mornings91% on time · p90 10 min · 2,207 flights
- Middays81% on time · p90 30 min · 1,780 flights
- Afternoons70% on time · p90 45 min · 1,208 flights
- Evenings70% on time · p90 55 min · 1,262 flights
- Overnights65% on time · p90 55 min · 1,481 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 84% on time.
- Saturdays84% on time · p90 25 min · 881 flights
- Tuesdays84% on time · p90 25 min · 1,023 flights
- Wednesdays84% on time · p90 30 min · 1,054 flights
- Mondays75% on time · p90 45 min · 1,262 flights
- Thursdays75% on time · p90 45 min · 1,256 flights
- Fridays73% on time · p90 50 min · 1,272 flights
- Sundays72% on time · p90 50 min · 1,190 flights
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