$92+ Cheap flights from St. Louis to Portland (STL - PDX)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
May 18 — May 251
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Portland with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to Portland are usually found in January or September, booked 90 days in advance, depart on a Tuesday or Friday and return on a Thursday
Cheap flight deals from St. Louis to Portland
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to PortlandExplore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
Explore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Mon 6/811:15 am
PDX
- STL
1 stop27h 50m
Frontier
Deal found 4/14![Frontier logo]()
$221
This Expedia deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Sun 5/311:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 4/16![Frontier logo]()
$226
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Mon 6/811:15 am
PDX
- STL
1 stop27h 50m
Frontier
Deal found 4/14![Frontier logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Tue 6/95:20 pm
PDX
- STL
2 stops22h 58m
Frontier
Deal found 4/17![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- PDX
1 stop22h 38m
Multiple Airlines
Thu 6/42:38 pm
PDX
- STL
2 stops40h 17m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$255
This Expedia deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Wed 5/2010:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$257
This Expedia deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:55 pm
STL
- PDX
1 stop13h 04m
Multiple Airlines
Wed 5/68:45 am
PDX
- STL
1 stop13h 14m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$260
This CheapOair deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Mon 6/156:19 pm
PDX
- STL
1 stop22h 32m
Frontier
Deal found 4/13![Frontier logo]()
$261
This CheapOair deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Sun 4/2611:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 4/13![Frontier logo]()
$262
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Mon 5/411:58 am
PDX
- STL
1 stop5h 34m
Frontier
Deal found 4/14![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Thu 6/412:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 4/16![Frontier logo]()
$270
Best flights from St. Louis to PortlandDiscover carefully curated flight deals from St. Louis to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from St. Louis to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:59 pm
STL
- PDX
1 stop5h 45m
Delta
Fri 5/225:05 pm
PDX
- STL
1 stop5h 25m
Delta
Deal found 4/13![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:41 pm
STL
- PDX
1 stop7h 01m
United Airlines
Tue 6/1611:40 pm
PDX
- STL
1 stop7h 01m
United Airlines
Deal found 4/17![United Airlines logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Sun 5/3110:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$358
This Southwest deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/133:50 pm
STL
- PDX
2 stops8h 30m
Southwest
Tue 6/169:20 pm
PDX
- STL
1 stop8h 25m
Southwest
Deal found 4/15![Southwest logo]()
$399
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:59 pm
STL
- PDX
1 stop5h 45m
Delta
Mon 6/811:15 pm
PDX
- STL
1 stop8h 17m
Delta
Deal found 4/17![Delta logo]()
$394
This Alaska Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Tue 8/181:48 pm
PDX
- STL
1 stop8h 11m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:25 am
STL
- PDX
2 stops12h 20m
Southwest
Wed 5/206:30 am
PDX
- STL
2 stops9h 25m
Southwest
Deal found 4/13![Southwest logo]()
$413
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:59 pm
STL
- PDX
1 stop5h 45m
Delta
Wed 6/311:20 am
PDX
- STL
2 stops11h 10m
Delta
Deal found 4/15![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:59 pm
STL
- PDX
1 stop5h 45m
Delta
Mon 6/88:42 pm
PDX
- STL
2 stops10h 00m
Delta
Deal found 4/14![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:59 pm
STL
- PDX
1 stop5h 45m
Delta
Wed 6/311:20 am
PDX
- STL
2 stops11h 10m
Delta
Deal found 4/15![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:59 pm
STL
- PDX
1 stop5h 45m
Delta
Mon 6/18:13 pm
PDX
- STL
2 stops10h 33m
Delta
Deal found 4/15![Delta logo]()
$407
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated April 18, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Sun 4/2611:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 4/13![Frontier logo]()
$262
This Expedia deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Sun 5/311:15 am
PDX
- STL
1 stop6h 06m
Frontier
Deal found 4/16![Frontier logo]()
$226
This Expedia deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:55 pm
STL
- PDX
1 stop13h 04m
Multiple Airlines
Wed 5/68:45 am
PDX
- STL
1 stop13h 14m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$260
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Mon 5/411:58 am
PDX
- STL
1 stop5h 34m
Frontier
Deal found 4/14![Frontier logo]()
$263
This Expedia deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Wed 5/2010:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:59 pm
STL
- PDX
1 stop6h 55m
United Airlines
Wed 5/207:45 pm
PDX
- STL
1 stop8h 02m
United Airlines
Deal found 4/13![United Airlines logo]()
$272
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Mon 5/1810:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$273
This Expedia deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Thu 6/412:35 pm
PDX
- STL
1 stop28h 48m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- PDX
1 stop22h 38m
Multiple Airlines
Thu 6/42:38 pm
PDX
- STL
2 stops40h 17m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$255
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Sun 5/3112:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 4/14![Frontier logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Thu 6/412:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 4/16![Frontier logo]()
$270
One-way flights from St. Louis to PortlandSearch for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 4/14![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:36 pm
STL
- PDX
1 stop10h 15m
Frontier
Deal found 4/14![Frontier logo]()
$111
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Deal found 4/14![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 4/15![Frontier logo]()
$133
This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Deal found 4/14![Frontier logo]()
$135
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:51 pm
STL
- PDX
1 stop28h 00m
Frontier
Deal found 4/14![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:51 pm
STL
- PDX
2 stops42h 59m
Frontier
Deal found 4/14![Frontier logo]()
$138
This Alaska Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$139
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$145
Find flight deals from St. Louis to Portland
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Portland (PDX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $221 (CheapOair) |
One-way from | $92 (CheapOair) |
Popular in | November |
Cheapest in | January |
Average price | $322 |
Good round-trip deal | $293 or less |
Good one-way deal | $144 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 18, 2026.
Use the filters below to find and compare flights from St. Louis to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/15
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Fri 5/22
5:05 pm-12:30 am
1 stop5h 25m
$309
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 6/12
5:41 pm-10:42 pm
1 stop7h 01m
Portland
Tue 6/16
11:40 pm-8:41 am
1 stop7h 01m
$328
Quickest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 5/26
5:33 pm-7:50 pm
Nonstop4h 17m
Portland
Sun 5/31
10:37 am-4:37 pm
Nonstop4h 00m
$358
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 6/4
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Mon 6/8
11:15 pm-9:32 am
1 stop8h 17m
$394
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/29
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Wed 6/3
11:20 am-12:30 am
2 stops11h 10m
$397
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 6/5
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Mon 6/8
8:42 pm-8:42 am
2 stops10h 00m
$397
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 5/28
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Wed 6/3
11:20 am-12:30 am
2 stops11h 10m
$397
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 8/15
5:37 pm-7:47 pm
Nonstop4h 10m
Portland
Tue 8/18
1:48 pm-11:59 pm
1 stop8h 11m
$398
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/13
3:50 pm-10:20 pm
2 stops8h 30m
Portland
Tue 6/16
9:20 pm-7:45 am
1 stop8h 25m
$399
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/29
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Mon 6/1
8:13 pm-8:46 am
2 stops10h 33m
$407
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Portland
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Portland in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| 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 Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Portland flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Portland flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Portland flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.
STL-PDX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Portland
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How far ahead should I book a flight from St. Louis to Portland?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Portland. Price data was last updated on April 10, 2026.
Booking 90 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.
What is the cheapest month to book a flight from St. Louis to Portland?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Portland (average of $292). Flying from St. Louis to Portland in November is currently the most expensive (average of $402). 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.
What is the cheapest time of day to fly from STL to PDX?
Find hourly flight availability from St. Louis to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 18, 2026.
When flying from St. Louis to Portland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
What’s the top layover airport for flights from St. Louis to Portland?
Share of 1-stop round-trip flights from St. Louis to Portland chosen by Cheapflights users in the past 12 months, using the same layover each way.
Seattle (SEA) – chosen by Cheapflights users on 67% of 1-stop itineraries from St. Louis to Portland on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Portland?
Average round-trip fare for 1-stop flights from St. Louis to Portland, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $244.
What’s the fastest layover option from St. Louis to Portland?
Shortest average travel time for 1-stop one-way flights from St. Louis to Portland, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 6h 24m.
Which airport typically offers the quickest layover for flights from St. Louis to Portland?
Average layover duration for 1-stop one-way flights from St. Louis to Portland, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Seattle (SEA) offer the fastest connection on this route, with an average layover time of 2h 16m.
Reviews of airlines servicing Portland
Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated April 18, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta from St. Louis to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsBeaverton
Seaside
Vancouver
Lincoln City
Longview
Lake Oswego
Hillsboro
Clackamas
Troutdale
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
Wilsonville
Depoe Bay
Stevenson
Tillamook
Astoria
Pacific City
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St. Louis and Portland flights
Browse other St. Louis and Portland flight options. Last updated on April 18, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on April 18, 2026.
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Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 18, 2026.
Top 6 airlines flying from St. Louis to Portland
Discover the top 6 airlines that operate flights from St. Louis to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$247 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$188 | Average$317 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$326 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$226 | Average$382 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$238 | Average$356 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$342 | FlexibilityNo cancel fee | On-time75% |