Frontier Airlines is the most reliable airline on the JAX to SJU route with a 74% on-time rate, compared to JetBlue Airways at 71%. Based on 742 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: JAX to SJU
Jacksonville to San Juan — airline reliability comparison
On-Time Rate by Airline
Frontier Airlines74%
JetBlue Airways71%
JAX to SJU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Frontier AirlinesF9Best | 74% | 3.4% | 113m | 742 |
| JetBlue AirwaysB6Worst | 71% | 2.5% | 72m | 117 |
Route Overview
74%
Overall On-Time
108m
Avg Delay
2.8%
Cancel Rate
865
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.