Southwest Airlines ISP to PBI on-time performance
Southwest Airlines nonstop flights from Islip to West Palm Beach/Palm Beach · Aug 2025 – Jul 2026
On-time arrivals
71%
arrived < 15 min late
Cancelled
1.5%
9 flights
Avg arrival delay
16 min
48 min when late
Rank on route
#2 of 3
route average 72% on time
Key facts
- Southwest Airlines flights on ISP to PBI arrived on time 71% of the time in Aug 2025 – Jul 2026.
- 1.5% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 72% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (39%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)39%
- Late-arriving aircraft31%
- Air traffic control & airport congestion26%
- Extreme weather3%
- Security0%
Other airlines on ISP to PBI
- JetBlue74% on time · 26 min avg delay
- Frontier Airlines70% on time · 27 min avg delay
Full ISP to PBI comparison →
Southwest Airlines on-time record across all routes →
581 Southwest Airlines flights tracked on this route; 9 cancelled, 1 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.