Southwest Airlines is the most reliable airline on the BWI to ISP route with a 77% on-time rate. Based on 4,675 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to ISP
Baltimore to Islip — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines77%
BWI to ISP Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 77% | 1.1% | 50m | 4,675 |
Route Overview
76%
Overall On-Time
51m
Avg Delay
1.2%
Cancel Rate
4,675
Total Flights
Flying out of BWI? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.