JFK to ONT flight delays & on-time performance
Nonstop flights from John F. Kennedy International Airport to Ontario International Airport · 2,429 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at JFK or ONT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from New York (JFK) to Ontario (ONT) arrived on time 60% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.8% were cancelled, and 17% arrived an hour or more late.
- JetBlue is the only airline reporting nonstop flights on this route.
- Departures scheduled around 5pm did best (86% on time); around 7pm did worst (55%).
- Friday was the most reliable day to fly (72% on time) and Sunday the least (45%).
- The largest source of delay minutes was air traffic control & airport congestion (37%).
Which airline is most on time from JFK to ONT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 60% | 1.8% | 31 min | 16.7% | 165 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5pm86%21 flights
- 6pm58%83 flights
- 7pm55%61 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday57%0.0% cancelled
- Tuesday61%0.0% cancelled
- Wednesday65%0.0% cancelled
- Thursday67%0.0% cancelled
- Friday72%0.0% cancelled
- Saturday55%8.3% cancelled
- Sunday45%4.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion37%
- Late-arriving aircraft34%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather9%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
JFK to ONT: common questions
- How often are JFK to ONT flights on time?
- 60% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from New York to Ontario cancelled?
- 1.8% of scheduled flights were cancelled (3 of 165).
- How long are typical delays?
- Across all flights the average arrival delay was 31 min (early arrivals count as zero). Flights that were late arrived 75 min behind schedule on average, and 16.7% of flights were an hour or more late.
- How long is taxi time at JFK?
- Flights on this route spent 40 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ONT to JFK — 70% on time
More flights from New York
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: JFK → ONT, nonstop flights by US airlines that report to the DOT. How we calculate this.