Historical on-time performance
Islip to West Palm Beach
Flights on ISP–PBI arrive on time 69% of the time over the last 12 months.
based on 1,163 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Southwest AirlinesOn-time69%Medianon timep9045 minCancel1.6%Flights641
- JetBlue AirwaysOn-time68%Medianon timep9085 minCancel2.5%Flights522
Why flights run late
Delay causes
- Airline26%
- Weather4%
- Air traffic (NAS)27%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline30%
- Weather57%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 23 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ISP → PBI
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 25 min · 1,024 flights
- Middays73% on time · p90 40 min · 726 flights
- Evenings71% on time · p90 85 min · 506 flights
- Afternoons60% on time · p90 85 min · 961 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 76% on time.
- Tuesdays76% on time · p90 45 min · 479 flights
- Saturdays75% on time · p90 50 min · 461 flights
- Wednesdays74% on time · p90 45 min · 427 flights
- Fridays74% on time · p90 65 min · 458 flights
- Mondays73% on time · p90 55 min · 441 flights
- Thursdays71% on time · p90 60 min · 492 flights
- Sundays68% on time · p90 70 min · 498 flights
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