Flight Check

Best Airline: LAS to STL

Las Vegas to St. Louis — airline reliability comparison

Frontier Airlines is the most reliable airline on the LAS to STL route with a 81% on-time rate, compared to Spirit Airlines at 75%. Based on 1,061 flights tracked.

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

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

Frontier Airlines81%
Southwest Airlines77%
Spirit Airlines75%

LAS to STL Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Frontier AirlinesF9Best81%1.9%67m1,061
Southwest AirlinesWN77%0.4%53m6,050
Spirit AirlinesNKWorst75%2.6%57m240

Route Overview

78%
Overall On-Time
55m
Avg Delay
0.7%
Cancel Rate
7,384
Total Flights
LAS to STL Route DetailsReturn: STL to LAS
LAS AirportSTL Airport

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