ISP to PBI flight delays & on-time performance
Nonstop flights from Long Island MacArthur Airport to Palm Beach International Airport · 1,052 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ISP or PBI right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Islip (ISP) to West Palm Beach/Palm Beach (PBI) arrived on time 72% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.1% were cancelled, and 9% arrived an hour or more late.
- JetBlue was the most punctual airline here (74% on time); Frontier Airlines was the least (70%).
- Departures scheduled around 11am did best (89% on time); around 5pm did worst (49%).
- Friday was the most reliable day to fly (76% on time) and Sunday the least (69%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from ISP to PBI?
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 | 74% | 2.5% | 26 min | 11.6% | 571 |
| Southwest Airlines | 71% | 1.5% | 16 min | 5.6% | 581 |
| Frontier Airlines | 70% | 4.3% | 27 min | 13.6% | 69 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am82%35 flights
- 6am83%127 flights
- 7am87%107 flights
- 8am85%13 flights
- 9am81%27 flights
- 10am81%71 flights
- 11am89%83 flights
- 12pm71%96 flights
- 1pm65%144 flights
- 2pm57%147 flights
- 3pm61%182 flights
- 4pm75%95 flights
- 5pm49%50 flights
- 6pm89%37 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%5.1% cancelled
- Tuesday74%1.7% cancelled
- Wednesday72%0.0% cancelled
- Thursday73%0.0% cancelled
- Friday76%0.0% cancelled
- Saturday71%1.8% cancelled
- Sunday69%6.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft41%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion21%
- Extreme weather8%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather62%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion12%
- Security0%
ISP to PBI: common questions
- How often are ISP to PBI flights on time?
- 72% 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 Islip to West Palm Beach/Palm Beach cancelled?
- 2.1% of scheduled flights were cancelled (26 of 1,221).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 8.8% of flights were an hour or more late.
- How long is taxi time at ISP?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PBI to ISP — 74% on time
More flights from Islip
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ISP → PBI, nonstop flights by US airlines that report to the DOT. How we calculate this.