Southwest Airlines is the most reliable airline on the ISP to BWI route with a 86% on-time rate. Based on 4,673 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ISP to BWI
Islip to Baltimore — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines86%
ISP to BWI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 86% | 0.9% | 64m | 4,673 |
Route Overview
86%
Overall On-Time
64m
Avg Delay
0.9%
Cancel Rate
4,673
Total Flights
Flying out of ISP? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.