Flight Check

Best Airline: BOS to MIA

Boston to Miami — airline reliability comparison

American Airlines is the most reliable airline on the BOS to MIA route with a 83% on-time rate, compared to Spirit Airlines at 68%. Based on 8,038 flights tracked.

This route involves weather-prone airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

American Airlines83%
Frontier Airlines75%
Delta Air Lines74%
JetBlue Airways72%
Spirit Airlines68%

BOS to MIA Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
American AirlinesAABest83%1.4%74m8,038
Frontier AirlinesF975%1.3%53m129
Delta Air LinesDL74%1.6%77m2,669
JetBlue AirwaysB672%2.0%69m1,365
Spirit AirlinesNKWorst68%2.2%81m1,008

Route Overview

79%
Overall On-Time
75m
Avg Delay
1.6%
Cancel Rate
13,349
Total Flights
BOS to MIA Route DetailsReturn: MIA to BOS
BOS AirportMIA Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.