Flight Check

Best Airline: LAS to ORD

Las Vegas to Chicago — airline reliability comparison

United Airlines is the most reliable airline on the LAS to ORD route with a 83% on-time rate, compared to Frontier Airlines at 66%. Based on 7,748 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 Airlines83%
American Airlines79%
Spirit Airlines79%
Southwest Airlines76%
Frontier Airlines66%

LAS to ORD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest83%1.0%74m7,748
American AirlinesAA79%1.1%93m6,048
Spirit AirlinesNK79%1.1%53m2,381
Southwest AirlinesWN76%0.7%55m2,335
Frontier AirlinesF9Worst66%4.4%73m500

Route Overview

79%
Overall On-Time
75m
Avg Delay
1.1%
Cancel Rate
19,036
Total Flights
LAS to ORD Route DetailsReturn: ORD to LAS
LAS AirportORD Airport

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