OnTimeStats

Historical on-time performance

ISPPBI

Islip to West Palm Beach

1,052 miData through Dec 2025Source: US DOT · BTS

Flights on ISP–PBI arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
Median delayon timetypical arrival
p90 delay60 min1 in 10 flights is worsetail risk
Cancelled0.6%of scheduled flights

based on 1,123 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time74%
    Medianon time
    p9050 min
    Cancel0.7%
    Flights731
  • Frontier Airlinesbest
    On-time81%
    Medianon time
    p90120 min
    Cancel0.0%
    Flights62
  • JetBlue Airways
    On-time68%
    Medianon time
    p9075 min
    Cancel0.6%
    Flights330

Why flights run late

Delay causes

  • Airline29%
  • Weather4%
  • Air traffic (NAS)29%
  • Late aircraft38%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→ISP airportIslip→PBI airportWest Palm Beach→Southwest Airlines on this routecarrier detail→Southwest Airlinesairline profile→

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.