Historical on-time performance
Las Vegas to Ontario
197 miData through Dec 2025Source: US DOT · BTS
Flights on LAS–ONT arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 2,559 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 timep9040 minCancel0.9%Flights754
- Southwest AirlinesOn-time76%Medianon timep9040 minCancel0.9%Flights1,805
Why flights run late
Delay causes
- Airline26%
- Weather2%
- Air traffic (NAS)8%
- Late aircraft64%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
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 · 2,250 flights
- Middays80% on time · p90 35 min · 1,725 flights
- Evenings68% on time · p90 60 min · 1,195 flights
- Afternoons67% on time · p90 50 min · 1,222 flights
- Overnights63% on time · p90 60 min · 1,593 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 84% on time.
- Saturdays84% on time · p90 25 min · 878 flights
- Wednesdays81% on time · p90 35 min · 1,083 flights
- Tuesdays81% on time · p90 35 min · 1,049 flights
- Mondays74% on time · p90 50 min · 1,281 flights
- Thursdays73% on time · p90 50 min · 1,255 flights
- Sundays72% on time · p90 50 min · 1,161 flights
- Fridays71% on time · p90 55 min · 1,278 flights
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