DAL (Dallas) to ONT (Ontario) flights arrive on time 72% of the time. The most reliable airline on this route is Southwest Airlines at 72%. The average delay is 58 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.DAL → ONT
DAL (Dallas) to ONT (Ontario)
DAL → ONT on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 72% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from DAL
78% on timeTSA is currently ~21 min. Best time: 4 AM (about 5 min).
DAL cancels 2.1% of flights — higher than average. Have a backup plan.
Arriving at ONT
82% on timeWhen flights into ONT are late, the average delay is 63 minutes. Build buffer if you have ground plans.
If connecting at ONT: TSA is ~13 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.