Route Reliability
Portland → St. Louis
PDX–STL · 1,708 miles · Portland International Airport to St. Louis Lambert International Airport
87
Pretty Reliable
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0%
- Cancelled
- 53
- Flights in the data
Data through May 2026.
Airlines on this route
- Southwest Airlines79% on time · 34 flights
- Alaska Airlines79% 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
Morning flights do better here.
PDX–STL flights departing between 9 AM–12 PM arrived on time 82% of the time, versus 63% between 12–3 PM.
Sunday scaries are real for this one.
PDX–STL flights arrived on time 95% of the time on Saturdays and just 70% on Sundays. That gap is worth planning around.
Flights on this route
The breakdown
- Mon—(2 flights)
- Tue—(2 flights)
- Wed—(3 flights)
- Thu—(3 flights)
- Fri—(3 flights)
- Sat95%(20 flights)
- Sun70%(20 flights)
- 6–9 AM—(9 flights)
- 9 AM–12 PM82%(28 flights)
- 12–3 PM63%(16 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.