Route Reliability
St. Louis → Portland
STL–PDX · 1,708 miles · St. Louis Lambert International Airport to Portland International Airport
87
Pretty Reliable
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.9%
- Cancelled
- 53
- Flights in the data
Data through May 2026.
Airlines on this route
- Southwest Airlines82% on time · 34 flights
- Alaska Airlines95% on time · 19 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
The 3–6 PM departure wins.
STL–PDX flights departing between 3–6 PM arrived on time 95% of the time, versus 80% between 6–9 PM.
Sunday scaries are real for this one.
STL–PDX flights arrived on time 90% of the time on Saturdays. On Sundays: 79%.
Flights on this route
The breakdown
- Mon—(2 flights)
- Tue—(2 flights)
- Wed—(3 flights)
- Thu—(3 flights)
- Fri—(3 flights)
- Sat90%(20 flights)
- Sun79%(19 flights)
- 12–3 PM83%(18 flights)
- 3–6 PM95%(19 flights)
- 6–9 PM80%(15 flights)
Keep nerding
Based on 53 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.