Historical on-time performance
New York to Ontario
2,429 miData through Dec 2025Source: US DOT · BTS
Flights on JFK–ONT arrive on time 59% of the time over the last 12 months.
On-time rate59%arrived within 15 min
p90 delay115 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 153 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time59%Median5 minp90115 minCancel1.3%Flights153
Why flights run late
Delay causes
- Airline21%
- Weather10%
- Air traffic (NAS)34%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JFK → ONT
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best day of week
On-time rates are fairly even by day on this route — ranging from 53% to 65% on time.
- Tuesdays65% on time · p90 100 min · 120 flights · limited
- Wednesdays64% on time · p90 50 min · 121 flights · limited
- Thursdays64% on time · p90 110 min · 121 flights · limited
- Mondays61% on time · p90 105 min · 120 flights · limited
- Fridays60% on time · p90 75 min · 121 flights · limited
- Sundays59% on time · p90 105 min · 120 flights · limited
- Saturdays53% on time · p90 120 min · 121 flights · limited
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