Alaska Airlines is the most reliable airline on the PIT to SEA route with a 79% on-time rate. Based on 1,660 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PIT to SEA
Pittsburgh to Seattle — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines79%
PIT to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 79% | 1.7% | 49m | 1,660 |
Route Overview
78%
Overall On-Time
50m
Avg Delay
1.4%
Cancel Rate
1,661
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.