Southwest Airlines is the most reliable airline on the ISP to PBI route with a 77% on-time rate, compared to Frontier Airlines at 71%. Based on 2,229 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ISP to PBI
Islip to West Palm Beach — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines77%
JetBlue Airways72%
Frontier Airlines71%
ISP to PBI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 77% | 1.0% | 64m | 2,229 |
| JetBlue AirwaysB6 | 72% | 1.2% | 95m | 799 |
| Frontier AirlinesF9Worst | 71% | 2.2% | 90m | 699 |
Route Overview
75%
Overall On-Time
78m
Avg Delay
1.5%
Cancel Rate
3,760
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.