Flight Check

Best Airline: DEN to SAT

Denver to San Antonio — airline reliability comparison

SkyWest Airlines is the most reliable airline on the DEN to SAT route with a 82% on-time rate, compared to Southwest Airlines at 74%. Based on 45 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

SkyWest Airlines82%
United Airlines80%
Frontier Airlines77%
Southwest Airlines74%

DEN to SAT Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
SkyWest AirlinesOOBest82%4.8%39m45
United AirlinesUA80%0.6%63m4,779
Frontier AirlinesF977%1.3%58m921
Southwest AirlinesWNWorst74%0.7%52m5,331

Route Overview

77%
Overall On-Time
57m
Avg Delay
0.7%
Cancel Rate
11,099
Total Flights
DEN to SAT Route DetailsReturn: SAT to DEN
DEN AirportSAT Airport

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