St Louis (STL) to Portland (PDX) flights
Alaska Airlines, Southwest Airlines fly nonstop from St. Louis Lambert International Airport to Portland International Airport, with about 9 flights a week in July 2026. The 1,708-mile flight takes about 4h 3m gate to gate.
- Distance
- 1,708 mi · 2,749 km
- Flight time
- 4h 3m
- Airlines
- 2
- Seats filled
- 82%
Airlines flying STL to PDX
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 7 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 10,975 | 4h 5m |
| Southwest Airlines | 2 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 5,031 | 3h 57m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to PDX flight schedule
3 flight numbers flew this route in August 2026. The first usually leaves at 5:37pm and the last at 9:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 1538Alaska Airlines | 5:37pm | 7:47pm | 18 | 84% |
| AS 1318Alaska Airlines | 6:08pm | 8:20pm | 13 | 85% |
| WN 3543Southwest Airlines | 9:55pm | 12:05am | 4 | n/a |
Is STL to PDX on time?
From September 2025 to August 2026, 78% of 145 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 6pm were the most punctual (88%), those around 5pm the least (83%). Most delay time was caused by late-arriving aircraft (63%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 111 | 86% | 7 min | 1.8% |
| Southwest Airlines | 34 | 53% | 22 min | 0% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 10 | 1,360 | |
| September 2025 | 8 | 1,111 | |
| May 2026 | 19 | 2,675 | |
| June 2026 | 38 | 5,482 | |
| July 2026 | 38 | 5,378 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.