SkyWest Airlines is the most reliable airline on the SEA to PDX route with a 86% on-time rate, compared to Alaska Airlines at 73%. Based on 11,860 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to PDX
Seattle to Portland — airline reliability comparison
On-Time Rate by Airline
SkyWest Airlines86%
Delta Air Lines80%
Alaska Airlines73%
SEA to PDX Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 86% | 0.5% | 52m | 11,860 |
| Delta Air LinesDL | 80% | 0.5% | 56m | 1,425 |
| Alaska AirlinesASWorst | 73% | 1.1% | 40m | 5,719 |
Route Overview
82%
Overall On-Time
48m
Avg Delay
0.7%
Cancel Rate
19,008
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.