New York (JFK) to Ontario (ONT): On-Time Performance
Data through July 2026
New York (JFK) to Ontario (ONT) is a thinner route than most in this dataset — 165 departures over the past year, roughly 3 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 65% arrived on time, noticeably below the national average of 78%.
- On-time
- 65%
- arrived <15 min late
- Avg delay
- 27 min
- completed flights
- Cancelled
- 1.9%
- Flights/day
- 0.45
- last 12 months
- Duration
- 6h 5m
- scheduled
- Distance
- 2,429 mi
Monthly on-time trend
Best time to fly from JFK to ONT
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 60% | 29 min |
| Tuesday | 67% | 21 min |
| Wednesday | 70% | 19 min |
| Thursday | 62% | 38 min |
| Fridaybest | 72% | 20 min |
| Saturday | 60% | 32 min |
| Sunday | 63% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations24%
- National airspace system34%
- Weather10%
Frequently asked questions
- How often are flights from JFK to ONT delayed?
- 35% of JFK–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 27 minutes.
- How long is the flight from JFK to ONT?
- The scheduled JFK–ONT flight time averages 6h 5m over 2,429 miles. Actual arrival times vary — flights on this route land 15+ minutes late 35% of the time.
- How often are JFK to ONT flights cancelled?
- 1.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from JFK to ONT?
- July 2025 was the roughest month in this dataset, with only 38% of arrivals on time. The best was October 2024 at 96%. If your dates are flexible, that 58-point gap is worth planning around.
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Based on 376 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.