Flight Check

Best Airline: SEA to DTW

Seattle to Detroit — airline reliability comparison

Delta Air Lines is the most reliable airline on the SEA to DTW route with a 88% on-time rate, compared to Alaska Airlines at 81%. Based on 5,501 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 Lines88%
Alaska Airlines81%

SEA to DTW Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest88%0.8%60m5,501
Alaska AirlinesASWorst81%1.1%43m1,842

Route Overview

86%
Overall On-Time
54m
Avg Delay
0.8%
Cancel Rate
7,344
Total Flights
SEA to DTW Route DetailsReturn: DTW to SEA
SEA AirportDTW Airport

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