Flight Check

Best Airline: IAH to LAS

Houston to Las Vegas — airline reliability comparison

United Airlines is the most reliable airline on the IAH to LAS route with a 80% on-time rate, compared to Frontier Airlines at 68%. Based on 8,628 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

United Airlines80%
Spirit Airlines78%
Southwest Airlines78%
Frontier Airlines68%

IAH to LAS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest80%0.9%65m8,628
Spirit AirlinesNK78%1.1%73m3,080
Southwest AirlinesWN78%1.4%58m1,266
Frontier AirlinesF9Worst68%2.4%113m1,082

Route Overview

79%
Overall On-Time
72m
Avg Delay
1%
Cancel Rate
14,073
Total Flights
IAH to LAS Route DetailsReturn: LAS to IAH
IAH AirportLAS Airport

Flying out of IAH? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

Free. No account needed.

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