Flight Check

Best Airline: SEA to LAS

Seattle to Las Vegas — airline reliability comparison

Delta Air Lines is the most reliable airline on the SEA to LAS route with a 85% on-time rate, compared to Frontier Airlines at 70%. Based on 6,280 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

Delta Air Lines85%
SkyWest Airlines82%
Alaska Airlines76%
Spirit Airlines76%
Southwest Airlines75%
Frontier Airlines70%

SEA to LAS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest85%0.6%57m6,280
SkyWest AirlinesOO82%0.0%21m29
Alaska AirlinesAS76%1.0%49m9,694
Spirit AirlinesNK76%1.0%63m2,085
Southwest AirlinesWN75%0.3%50m3,461
Frontier AirlinesF9Worst70%1.8%101m1,066

Route Overview

78%
Overall On-Time
55m
Avg Delay
0.8%
Cancel Rate
22,660
Total Flights
SEA to LAS Route DetailsReturn: LAS to SEA
SEA AirportLAS Airport

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