Historical on-time performance
Fort Lauderdale to Islip
1,092 miData through Dec 2025Source: US DOT · BTS
Flights on FLL–ISP arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 158 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time80%Medianon timep9060 minCancel0.0%Flights158
Why flights run late
Delay causes
- Airline29%
- Weather1%
- Air traffic (NAS)12%
- Late aircraft59%
- 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 FLL → ISP
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 265 flights
- Middays68% on time · p90 65 min · 354 flights
- Afternoons62% on time · p90 85 min · 206 flights
- Evenings62% on time · p90 65 min · 78 flights · limited
- Overnights54% on time · p90 75 min · 56 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 58% to 79% on time.
- Wednesdays79% on time · p90 45 min · 137 flights · limited
- Tuesdays77% on time · p90 55 min · 125 flights · limited
- Fridays76% on time · p90 50 min · 136 flights · limited
- Saturdays72% on time · p90 55 min · 156 flights · limited
- Thursdays68% on time · p90 75 min · 122 flights · limited
- Mondays66% on time · p90 55 min · 137 flights · limited
- Sundays58% on time · p90 100 min · 146 flights · limited
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