Spirit Airlines is the most reliable airline on the BWI to SJU route with a 74% on-time rate, compared to Frontier Airlines at 56%. Based on 1,279 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to SJU
Baltimore to San Juan — airline reliability comparison
On-Time Rate by Airline
Spirit Airlines74%
Southwest Airlines69%
Frontier Airlines56%
BWI to SJU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Spirit AirlinesNKBest | 74% | 2.9% | 68m | 1,279 |
| Southwest AirlinesWN | 69% | 0.5% | 51m | 2,883 |
| Frontier AirlinesF9Worst | 56% | 4.6% | 119m | 565 |
Route Overview
68%
Overall On-Time
65m
Avg Delay
1.7%
Cancel Rate
4,794
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.