Ontario (ONT) to New York (JFK): On-Time Performance
Data through July 2026
Ontario (ONT) to New York (JFK) 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, 75% arrived on time.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 37 min
- completed flights
- Cancelled
- 2.1%
- Flights/day
- 0.45
- last 12 months
- Duration
- 5h 25m
- scheduled
- Distance
- 2,429 mi
Monthly on-time trend
Best time to fly from ONT to JFK
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 34 min |
| Tuesday | 75% | 38 min |
| Wednesday | 79% | 20 min |
| Thursday | 69% | 31 min |
| Friday | 72% | 92 min |
| Saturday | 71% | 33 min |
| Sundaybest | 80% | 13 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 operations65%
- National airspace system3%
Frequently asked questions
- How often are flights from ONT to JFK delayed?
- 26% of ONT–JFK 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 37 minutes.
- How long is the flight from ONT to JFK?
- The scheduled ONT–JFK flight time averages 5h 25m over 2,429 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are ONT to JFK flights cancelled?
- 2.1% 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 ONT to JFK?
- July 2026 was the roughest month in this dataset, with only 38% of arrivals on time. The best was September 2024 at 90%. If your dates are flexible, that 52-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.