Alaska Airlines is the most reliable airline on the STL to PDX route with a 91% on-time rate, compared to Southwest Airlines at 71%. Based on 80 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to PDX
St. Louis to Portland — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines91%
Southwest Airlines71%
STL to PDX Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 91% | 2.2% | 39m | 80 |
| Southwest AirlinesWNWorst | 71% | 3.3% | 36m | 53 |
Route Overview
76%
Overall On-Time
37m
Avg Delay
2%
Cancel Rate
149
Total Flights
Flying out of STL? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.