Ontario (ONT) to Austin (AUS): On-Time Performance
Data through July 2026
Ontario (ONT) to Austin (AUS) is a thinner route than most in this dataset — 337 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 80% arrived on time.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 0.92
- last 12 months
- Duration
- 2h 45m
- scheduled
- Distance
- 1,196 mi
Monthly on-time trend
Best time to fly from ONT to AUS
Aim for departures around 6 a.m. (93% on-time); avoid 2 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 12 min |
| Tuesday | 81% | 11 min |
| Wednesday | 79% | 7 min |
| Thursday | 82% | 9 min |
| Friday | 78% | 12 min |
| Saturdaybest | 87% | 7 min |
| Sunday | 77% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations30%
- National airspace system29%
- Weather1%
Frequently asked questions
- How often are flights from ONT to AUS delayed?
- 20% of ONT–AUS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 10 minutes.
- What is the best time of day to fly from ONT to AUS?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 2 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ONT to AUS?
- The scheduled ONT–AUS flight time averages 2h 45m over 1,196 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are ONT to AUS flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from ONT to AUS?
- July 2026 was the roughest month in this dataset, with only 48% of arrivals on time. The best was September 2024 at 97%. If your dates are flexible, that 49-point gap is worth planning around.
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Based on 739 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.