Miami to Boston — airline reliability comparison
Frontier Airlines is the most reliable airline on the MIA to BOS route with a 86% on-time rate, compared to JetBlue Airways at 65%. Based on 129 flights tracked.
This route involves weather-prone airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Frontier AirlinesF9Best | 86% | 1.3% | 52m | 129 |
| Spirit AirlinesNK | 75% | 2.6% | 70m | 1,010 |
| American AirlinesAA | 72% | 1.4% | 70m | 8,043 |
| Delta Air LinesDL | 69% | 1.7% | 92m | 2,667 |
| JetBlue AirwaysB6Worst | 65% | 2.9% | 94m | 1,364 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.