Flight Check

Best Airline: BIL to DEN

Billings to Denver — airline reliability comparison

United Airlines is the most reliable airline on the BIL to DEN route with a 81% on-time rate, compared to SkyWest Airlines at 81%. Based on 2,617 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 Airlines81%
SkyWest Airlines81%

BIL to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest81%0.6%70m2,617
SkyWest AirlinesOOWorst81%2.5%88m2,583

Route Overview

81%
Overall On-Time
77m
Avg Delay
1.2%
Cancel Rate
5,210
Total Flights
BIL to DEN Route DetailsReturn: DEN to BIL
BIL AirportDEN Airport

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