
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $204 (Expedia) |
One-way from | $86 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $305 |
Good round-trip deal | $283 or less |
Good one-way deal | $134 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 5/7
6:30 am-12:54 pm
1 stop8h 24m
Portland
Tue 5/12
5:05 pm-12:36 am
1 stop5h 31m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 3/4
6:25 am-11:55 am
1 stop7h 30m
Portland
Mon 3/9
3:45 pm-11:34 pm
1 stop5h 49m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 3/3
11:23 am-5:33 pm
1 stop8h 10m
Portland
Mon 3/9
11:15 pm-9:46 am
1 stop8h 31m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 3/2
2:22 pm-6:16 pm
1 stop5h 54m
Portland
Mon 3/9
5:02 pm-12:21 am
1 stop5h 19m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 2/25
7:00 am-12:25 pm
1 stop7h 25m
Portland
Mon 3/2
5:00 pm-12:25 am
1 stop5h 25m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/10
6:12 pm-11:54 pm
1 stop7h 42m
Portland
Sat 4/25
11:15 pm-9:42 am
1 stop8h 27m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 4/13
6:45 pm-11:53 pm
1 stop7h 08m
Portland
Mon 4/27
11:15 pm-9:42 am
1 stop8h 27m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 6/1
6:59 pm-11:41 pm
1 stop6h 42m
Portland
Mon 6/8
10:55 pm-9:30 am
1 stop8h 35m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 2/28
3:40 pm-10:48 pm
2 stops9h 08m
Portland
Fri 3/6
11:35 am-12:25 am
2 stops10h 50m
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 3/3
2:22 pm-8:55 pm
2 stops8h 33m
Portland
Tue 3/10
1:56 pm-12:21 am
2 stops8h 25m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, January is the cheapest month in which you can book a flight from St. Louis to Portland (average of $150). Flying from St. Louis to Portland in March is currently the most expensive (average of $257). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Seattle (SEA) – chosen by Cheapflights users on 50% of 1-stop itineraries from St. Louis to Portland on Cheapflights.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $244.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 6h 05m.
Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 0h 48m.
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
Food
Entertainment
Boarding
Crew
Comfort
Overall
Reviews
Anonymous,Dec 2025
SEA - MSY
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$246 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$188 | Average$336 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$222 | Average$395 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$222 | Average$329 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$244 | Average$383 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$248 | Average$389 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$338 | Average$520 | FlexibilityNo cancel fee | On-time85% |