Flight Check

Best Airline: DEN to LAS

Denver to Las Vegas — airline reliability comparison

United Airlines is the most reliable airline on the DEN to LAS route with a 76% on-time rate, compared to Spirit Airlines at 68%. Based on 8,929 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 Airlines76%
Frontier Airlines74%
Southwest Airlines73%
Spirit Airlines68%

DEN to LAS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest76%0.7%67m8,929
Frontier AirlinesF974%1.0%71m6,218
Southwest AirlinesWN73%1.2%56m13,110
Spirit AirlinesNKWorst68%1.6%77m772

Route Overview

74%
Overall On-Time
63m
Avg Delay
1.1%
Cancel Rate
29,029
Total Flights
DEN to LAS Route DetailsReturn: LAS to DEN
DEN AirportLAS Airport

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