Southwest Airlines is the most reliable airline on the SJU to BWI route with a 82% on-time rate, compared to Frontier Airlines at 66%. Based on 2,883 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SJU to BWI
San Juan to Baltimore — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines82%
Spirit Airlines80%
Frontier Airlines66%
SJU to BWI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 82% | 0.5% | 49m | 2,883 |
| Spirit AirlinesNK | 80% | 2.9% | 101m | 1,279 |
| Frontier AirlinesF9Worst | 66% | 2.7% | 73m | 565 |
Route Overview
79%
Overall On-Time
65m
Avg Delay
1.4%
Cancel Rate
4,794
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.