Flight Check

Best Airline: BOS to DEN

Boston to Denver — airline reliability comparison

United Airlines is the most reliable airline on the BOS to DEN route with a 84% on-time rate, compared to JetBlue Airways at 72%. Based on 6,810 flights tracked.

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

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

United Airlines84%
Delta Air Lines79%
Southwest Airlines76%
JetBlue Airways72%

BOS to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest84%1.5%63m6,810
Delta Air LinesDL79%0.9%45m1,454
Southwest AirlinesWN76%0.9%56m2,870
JetBlue AirwaysB6Worst72%1.0%66m2,181

Route Overview

79%
Overall On-Time
62m
Avg Delay
1.2%
Cancel Rate
13,315
Total Flights
BOS to DEN Route DetailsReturn: DEN to BOS
BOS AirportDEN Airport

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