ISP to FLL flight delays & on-time performance
Nonstop flights from Long Island MacArthur Airport to Fort Lauderdale Hollywood International Airport · 1,092 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ISP or FLL 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 Fort Lauderdale (FLL) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.7% were cancelled, and 11% arrived an hour or more late.
- Departures scheduled around 6am did best (96% on time); around 4pm did worst (41%).
- Wednesday was the most reliable day to fly (87% on time) and Sunday the least (58%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from ISP to FLL?
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 | 71% | 1.6% | 26 min | 10.9% | 383 |
| Southwest Airlines | 67% | 0.0% | 9 min | 0.0% | 3 |
| Frontier Airlines | 22% | 5.3% | 38 min | 22.2% | 19 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am96%23 flights
- 7am80%15 flights
- 8am53%18 flights
- 11am74%66 flights
- 12pm80%72 flights
- 1pm70%47 flights
- 3pm52%28 flights
- 4pm41%38 flights
- 5pm91%11 flights
- 7pm45%23 flights
- 8pm64%34 flights
- 9pm94%18 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday61%6.8% cancelled
- Tuesday71%0.0% cancelled
- Wednesday87%0.0% cancelled
- Thursday67%0.0% cancelled
- Friday69%1.7% cancelled
- Saturday70%1.6% cancelled
- Sunday58%1.7% 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 aircraft43%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion16%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather71%
- Airline (crew, maintenance, cleaning, fueling)14%
- Air traffic control & airport congestion14%
- Security0%
ISP to FLL: common questions
- How often are ISP to FLL flights on time?
- 69% 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 Fort Lauderdale cancelled?
- 1.7% of scheduled flights were cancelled (7 of 405).
- How long are typical delays?
- Across all flights the average arrival delay was 26 min (early arrivals count as zero). Flights that were late arrived 82 min behind schedule on average, and 11.4% of flights were an hour or more late.
- How long is taxi time at ISP?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: FLL to ISP — 71% 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 → FLL, nonstop flights by US airlines that report to the DOT. How we calculate this.