Austin (AUS) to Ontario (ONT): On-Time Performance
Data through July 2026
Austin (AUS) to Ontario (ONT) is a thinner route than most in this dataset — 335 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 77% arrived on time.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 0.92
- last 12 months
- Duration
- 3h 7m
- scheduled
- Distance
- 1,196 mi
Monthly on-time trend
Best time to fly from AUS to ONT
Aim for departures around 1 p.m. (88% on-time); avoid 7 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 13 min |
| Tuesdaybest | 87% | 6 min |
| Wednesday | 81% | 8 min |
| Thursday | 74% | 11 min |
| Friday | 74% | 16 min |
| Saturday | 80% | 12 min |
| Sunday | 67% | 21 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft64%
- Airline operations28%
- National airspace system8%
- Weather1%
Frequently asked questions
- How often are flights from AUS to ONT delayed?
- 23% of AUS–ONT 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 12 minutes.
- What is the best time of day to fly from AUS to ONT?
- Departures around 1 p.m. have the best record (88% on-time), while departures around 7 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from AUS to ONT?
- The scheduled AUS–ONT flight time averages 3h 7m over 1,196 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are AUS to ONT 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 AUS to ONT?
- July 2024 was the roughest month in this dataset, with only 52% of arrivals on time. The best was January 2025 at 94%. If your dates are flexible, that 42-point gap is worth planning around.
Explore related pages
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Related guides
Based on 737 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.