PHL to ISP flight delays & on-time performance
Nonstop flights from Philadelphia International Airport to Long Island MacArthur Airport · 129 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHL or ISP right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Philadelphia (PHL) to Islip (ISP) arrived on time 0% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0% were cancelled, and 100% arrived an hour or more late.
- Frontier Airlines is the only airline reporting nonstop flights on this route.
- The largest source of delay minutes was extreme weather (96%).
Which airline is most on time from PHL to ISP?
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 |
|---|---|---|---|---|---|
| Frontier Airlines | 0% | 0.0% | 311 min | 100.0% | 1 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
Not enough departures across different hours to compare.
Best day of the week
On-time arrival rate by day of departure.
- Sunday0%0.0% cancelled
On-time trend by month
Monthly trend appears once two or more months of data are available.
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Extreme weather96%
- Air traffic control & airport congestion4%
- Airline (crew, maintenance, cleaning, fueling)0%
- Late-arriving aircraft0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
PHL to ISP: common questions
- How often are PHL to ISP flights on time?
- 0% 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 Philadelphia to Islip cancelled?
- 0.0% of scheduled flights were cancelled (0 of 1).
- How long are typical delays?
- Across all flights the average arrival delay was 311 min (early arrivals count as zero). Flights that were late arrived 311 min behind schedule on average, and 100.0% of flights were an hour or more late.
- How long is taxi time at PHL?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
More flights from Philadelphia
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHL → ISP, nonstop flights by US airlines that report to the DOT. How we calculate this.