ONT (Ontario) to AUS (Austin) flights arrive on time 88% of the time. The most reliable airline on this route is Southwest Airlines at 87%. The average delay is 64 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.ONT → AUS
ONT (Ontario) to AUS (Austin)
ONT → AUS on-time performance by month
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25
JanFebMarAprMayJunJulAugSepOctNovDec
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This route is usually on time. About 88% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
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Good to know
Departing from ONT
82% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at AUS
79% on timeWhen flights into AUS are late, the average delay is 66 minutes. Build buffer if you have ground plans.
If connecting at AUS: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.