Southwest Airlines is the most reliable airline on the MIA to ISP route with a 78% on-time rate. Based on 241 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MIA to ISP
Miami to Islip — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines78%
MIA to ISP Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 78% | 0.0% | 94m | 241 |
Route Overview
79%
Overall On-Time
97m
Avg Delay
0%
Cancel Rate
241
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.