Route on-time record
FLL to ISP: most on-time flights and the best time to fly
Fort Lauderdale (Fort Lauderdale Hollywood International Airport) to Islip (Long Island MacArthur Airport). 376 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 2.1% were cancelled. The most reliable flight number was JetBlue 514 at 5:16 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
FLL → ISP
Fort Lauderdale to Islip: 376 nonstop flights a year
On time (12 months)
74%
Cancelled
2.1%
avg delay 18 min
Best time to leave
Before 9 AM
89% on time vs 56% 3 to 6 PM
Most reliable airline
JetBlue
75% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · JetBlue 514
5:16 PM → 8:04 PM2h 48m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 77%
- Cancelled
- 1.8%
- Avg arrival delay
- 16 min
- Arrived on time 77% of the time (327 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 56% on time; Before 9 AM: 89%).
- Departs inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 327 flights
Find JetBlue 514 fares Opens this date on Aviasales#2 · JetBlue 1114
8:59 PM → 11:46 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-03-30.
67%
chance on time
- On time (history)
- 53%
- Cancelled
- 5.6%
- Avg arrival delay
- 22 min
- Arrived on time 53% of the time (17 flights, Jun 2025 to May 2026).
- Departs outside FLL's trouble window (1 PM to 7 PM, when 70% of its 20 ground stops and delay programs started).
- 51% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (17 flights), so its score leans on the airline's record at this hour.
Limited track record · 17 flights
Find JetBlue 1114 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- JetBlue75%
354 flights · 76% on time as flown · 2.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
194 flights · avg delay 8 min
- 3 to 6 PM56%
88 flights · avg delay 29 min
Best day: Wednesday (83%). Worst: Sunday (53%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft52%
- Airline (crew, maintenance, boarding)33%
- Air traffic control and airport volume13%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
FLL to ISP questions
- What time of day is best to fly FLL to ISP?
- Before 9 AM: 89% of flights arrived on time, against 56% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from FLL to ISP?
- JetBlue, with a season-adjusted 75% chance of operating and arriving on time over 354 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on FLL to ISP?
- March (62% on time); the best was April (83%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from FLL
- ISP to FLL (return)
- FLL to ATL 71%
- FLL to EWR 70%
- FLL to LGA 66%
- FLL to JFK 69%
- FLL to BOS 66%
- FLL to ORD 69%
- FLL to PHL 73%
- FLL to BWI 73%
- FLL to CLT 78%
- FLL to DFW 72%
- FLL to IAH 82%
- FLL to DTW 73%
Live status: FAA delays and ground stops