Flight Check

Best Airline: DTW to SEA

Detroit to Seattle — airline reliability comparison

Delta Air Lines is the most reliable airline on the DTW to SEA route with a 83% on-time rate, compared to Alaska Airlines at 79%. Based on 5,509 flights tracked.

This route involves weather-prone airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

Delta Air Lines83%
Alaska Airlines79%

DTW to SEA Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest83%0.7%59m5,509
Alaska AirlinesASWorst79%1.2%49m1,842

Route Overview

82%
Overall On-Time
57m
Avg Delay
0.8%
Cancel Rate
7,352
Total Flights
DTW to SEA Route DetailsReturn: SEA to DTW
DTW AirportSEA Airport

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