Flight Check

Best Airline: ORD to LAS

Chicago to Las Vegas — airline reliability comparison

United Airlines is the most reliable airline on the ORD to LAS route with a 81% on-time rate, compared to Frontier Airlines at 60%. Based on 7,751 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%
Spirit Airlines78%
Southwest Airlines74%
American Airlines73%
Frontier Airlines60%

ORD to LAS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest81%0.8%63m7,751
Spirit AirlinesNK78%1.0%71m2,386
Southwest AirlinesWN74%1.0%60m2,324
American AirlinesAA73%1.1%66m6,050
Frontier AirlinesF9Worst60%5.4%111m502

Route Overview

76%
Overall On-Time
68m
Avg Delay
1.1%
Cancel Rate
19,039
Total Flights
ORD to LAS Route DetailsReturn: LAS to ORD
ORD AirportLAS Airport

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