Flight Check

Best Airline: SEA to DFW

Seattle to Dallas — airline reliability comparison

American Airlines is the most reliable airline on the SEA to DFW route with a 79% on-time rate, compared to Frontier Airlines at 54%. Based on 9,486 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

American Airlines79%
Delta Air Lines77%
Alaska Airlines75%
Frontier Airlines54%

SEA to DFW Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
American AirlinesAABest79%2.1%99m9,486
Delta Air LinesDL77%1.4%83m1,453
Alaska AirlinesAS75%1.3%45m6,323
Frontier AirlinesF9Worst54%2.3%76m138

Route Overview

77%
Overall On-Time
76m
Avg Delay
1.7%
Cancel Rate
17,449
Total Flights
SEA to DFW Route DetailsReturn: DFW to SEA
SEA AirportDFW Airport

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