Frontier Airlines FLL to ISP on-time performance
Frontier Airlines nonstop flights from Fort Lauderdale to Islip · Aug 2025 – Jul 2026
On-time arrivals
44%
arrived < 15 min late
Cancelled
5.3%
1 flights
Avg arrival delay
50 min
90 min when late
Rank on route
#2 of 3
route average 71% on time
Key facts
- Frontier Airlines flights on FLL to ISP arrived on time 44% of the time in Aug 2025 – Jul 2026.
- 5.3% were cancelled, and 28% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 71% on time overall.
- The largest source of delay minutes was late-arriving aircraft (78%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft78%
- Air traffic control & airport congestion16%
- Airline (crew, maintenance, cleaning, fueling)6%
- Extreme weather0%
- Security0%
Other airlines on FLL to ISP
- JetBlue73% on time · 19 min avg delay
- Southwest Airlines33% on time · 12 min avg delay
Full FLL to ISP comparison →
Frontier Airlines on-time record across all routes →
19 Frontier Airlines flights tracked on this route; 1 cancelled, 0 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.