Route
PDX → STL
Portland International Airport St. Louis Lambert International Airport
1,708 miles
Return route STL → PDX →
How punctual is this route?
- On-time arrivals
- 77.6%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 39 min
- Flights arriving 15+ minutes late
- Flights tracked
- 145
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 40%
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 27%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 62.5% | 8 |
| May 2026 | 78.9% | 19 |
| June 2026 | 78.9% | 38 |
| July 2026 | 81.1% | 39 |
| August 2026 | 75.6% | 41 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 111 | 78.9% | 0.9% | 41 min |
| Southwest Airlines | 34 | 73.5% | 0.0% | 36 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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