Delta Air Lines is the most reliable airline on the GEG to SEA route with a 90% on-time rate, compared to Alaska Airlines at 81%. Based on 1,254 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: GEG to SEA
Spokane to Seattle — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines90%
SkyWest Airlines88%
Alaska Airlines81%
GEG to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 90% | 1.4% | 123m | 1,254 |
| SkyWest AirlinesOO | 88% | 0.5% | 64m | 11,170 |
| Alaska AirlinesASWorst | 81% | 0.9% | 47m | 5,896 |
Route Overview
86%
Overall On-Time
59m
Avg Delay
0.7%
Cancel Rate
18,342
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.