Historical on-time performance
Ontario to Dallas
1,200 miData through Dec 2025Source: US DOT · BTS
Flights on ONT–DAL arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 376 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9030 minCancel1.3%Flights376
Why flights run late
Delay causes
- Airline29%
- Weather0%
- Air traffic (NAS)22%
- Late aircraft48%
- 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 ONT → DAL
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 — 92% on time.
- Mornings92% on time · p90 10 min · 628 flights
- Afternoons73% on time · p90 45 min · 74 flights · limited
- Middays70% on time · p90 40 min · 421 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 92% on time.
- Saturdays92% on time · p90 10 min · 152 flights · limited
- Sundays86% on time · p90 15 min · 199 flights · limited
- Tuesdays83% on time · p90 25 min · 160 flights · limited
- Wednesdays81% on time · p90 20 min · 158 flights · limited
- Thursdays80% on time · p90 25 min · 156 flights · limited
- Fridays78% on time · p90 25 min · 158 flights · limited
- Mondays78% on time · p90 40 min · 160 flights · limited
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