is the most reliable airline on the MIA to SJU route with a 85% on-time rate, compared to Spirit Airlines at 74%. Based on 13 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MIA to SJU
Miami to San Juan — airline reliability comparison
On-Time Rate by Airline
85%
Frontier Airlines78%
American Airlines77%
Spirit Airlines74%
MIA to SJU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 85% | 0.0% | 92m | 13 |
| Frontier AirlinesF9 | 78% | 1.7% | 95m | 1,730 |
| American AirlinesAA | 77% | 0.3% | 67m | 7,019 |
| Spirit AirlinesNKWorst | 74% | 1.5% | 90m | 1,136 |
Route Overview
77%
Overall On-Time
74m
Avg Delay
0.7%
Cancel Rate
9,911
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.