Ontario (ONT) to New York (JFK): On-Time Performance
Data through May 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, 79% arrived on time.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 1.7%
- 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 | 79% | 15 min |
| Tuesday | 83% | 11 min |
| Wednesdaybest | 85% | 18 min |
| Thursday | 72% | 22 min |
| Friday | 74% | 58 min |
| Saturday | 73% | 15 min |
| Sunday | 85% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations55%
- National airspace system3%
Frequently asked questions
- How often are flights from ONT to JFK delayed?
- 22% of ONT–JFK flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 22 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 22% of the time.
- How often are ONT to JFK flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What day of the week is most reliable for ONT to JFK?
- Wednesday flights have the best record at 85% on-time. Day-of-week differences on this route are meaningful — Thursday trails at 72%.
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Based on 345 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.