$106+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Jul 14 — Jul 211
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 59 days in advance, depart on a Tuesday or Friday and return on a Friday
Cheap flight deals from St. Louis to Portland
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Last-minute
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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 June 14, 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 June 14, 2026.
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Sat 8/298:00 am
STL
- PDX
2 stops9h 05m
United Airlines
Sun 9/65:00 am
PDX
- STL
1 stop5h 40m
United Airlines
Deal found 6/9![United Airlines logo]()
$290
This Southwest deal was found by Cheapflights users on 6/11. 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.
Thu 8/136:00 pm
STL
- PDX
1 stop7h 15m
Southwest
Thu 8/209:20 am
PDX
- STL
2 stops11h 45m
Southwest
Deal found 6/11![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 6/11. 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.
Fri 8/75:30 pm
STL
- PDX
1 stop7h 15m
Southwest
Mon 8/1011:30 pm
PDX
- STL
1 stop8h 05m
Southwest
Deal found 6/11![Southwest logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 8/128:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Tue 8/185:42 pm
PDX
- STL
2 stops19h 06m
Frontier
Deal found 6/9![Frontier logo]()
$295
This Southwest deal was found by Cheapflights users on 6/11. 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.
Thu 8/136:00 pm
STL
- PDX
1 stop7h 15m
Southwest
Wed 8/1910:45 pm
PDX
- STL
2 stops14h 25m
Southwest
Deal found 6/11![Southwest logo]()
$296
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 11/71:30 pm
STL
- PDX
1 stop6h 08m
United Airlines
Sat 11/148:45 am
PDX
- STL
2 stops8h 40m
United Airlines
Deal found 6/11![United Airlines logo]()
$297
This CheapOair deal was found by Cheapflights users on 6/13. 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.
Wed 8/128:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Wed 8/195:42 pm
PDX
- STL
1 stop23h 41m
Frontier
Deal found 6/13![Frontier logo]()
$300
This Southwest deal was found by Cheapflights users on 6/9. 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 8/298:30 am
STL
- PDX
Nonstop4h 10m
Southwest
Sun 9/611:30 pm
PDX
- STL
1 stop7h 45m
Southwest
Deal found 6/9![Southwest logo]()
$304
This Delta deal was found by Cheapflights users on 6/9. 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 9/176:55 pm
STL
- PDX
1 stop6h 45m
Delta
Mon 9/2111:00 pm
PDX
- STL
1 stop8h 29m
Delta
Deal found 6/9![Delta logo]()
$305
This Southwest deal was found by Cheapflights users on 6/13. 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.
Sat 9/58:30 am
STL
- PDX
Nonstop4h 10m
Southwest
Tue 9/1511:30 pm
PDX
- STL
1 stop8h 05m
Southwest
Deal found 6/13![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 6/11. 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.
Tue 9/226:30 pm
STL
- PDX
1 stop5h 45m
Southwest
Sat 9/266:50 am
PDX
- STL
2 stops6h 40m
Southwest
Deal found 6/11![Southwest logo]()
$310
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 June 14, 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 June 14, 2026.
This Southwest deal was found by Cheapflights users on 6/11. 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 11/76:35 am
STL
- PDX
2 stops10h 05m
Southwest
Sat 11/146:45 am
PDX
- STL
2 stops7h 35m
Southwest
Deal found 6/11![Southwest logo]()
$313
This Delta deal was found by Cheapflights users on 6/9. 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.
Tue 7/75:36 pm
STL
- PDX
1 stop7h 42m
Delta
Tue 7/145:14 pm
PDX
- STL
1 stop5h 27m
Delta
Deal found 6/9![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 9/128:50 am
STL
- PDX
2 stops10h 59m
United Airlines
Sat 9/195:00 am
PDX
- STL
1 stop5h 40m
United Airlines
Deal found 6/11![United Airlines logo]()
$356
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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.
Sat 8/226:08 pm
STL
- PDX
Nonstop4h 12m
Alaska Airlines
Fri 8/2811:16 am
PDX
- STL
Nonstop3h 54m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 6/12. 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 8/227:10 am
STL
- PDX
1 stop6h 40m
Southwest
Wed 9/211:30 pm
PDX
- STL
1 stop7h 45m
Southwest
Deal found 6/12![Southwest logo]()
$319
This Southwest deal was found by Cheapflights users on 6/10. 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 9/912:20 pm
STL
- PDX
2 stops9h 30m
Southwest
Wed 9/1611:35 am
PDX
- STL
2 stops7h 35m
Southwest
Deal found 6/10![Southwest logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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.
Tue 10/67:00 am
STL
- PDX
1 stop8h 27m
Alaska Airlines
Sat 10/103:48 pm
PDX
- STL
1 stop6h 11m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$397
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Tue 10/65:10 am
STL
- PDX
2 stops8h 55m
United Airlines
Sat 10/102:27 pm
PDX
- STL
1 stop6h 32m
United Airlines
Deal found 6/13![United Airlines logo]()
$424
This Southwest deal was found by Cheapflights users on 6/11. 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.
Tue 9/2212:20 pm
STL
- PDX
2 stops9h 30m
Southwest
Tue 9/295:50 am
PDX
- STL
2 stops10h 00m
Southwest
Deal found 6/11![Southwest logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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.
Sat 7/45:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Wed 7/88:19 am
PDX
- STL
1 stop8h 38m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 6/9. 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.
Fri 8/76:40 pm
STL
- PDX
1 stop6h 05m
Southwest
Sat 8/89:45 am
PDX
- STL
Nonstop3h 45m
Southwest
Deal found 6/9![Southwest logo]()
$391
This Southwest deal was found by Cheapflights users on 6/13. 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 7/15:20 pm
STL
- PDX
1 stop7h 15m
Southwest
Tue 7/145:50 am
PDX
- STL
2 stops9h 55m
Southwest
Deal found 6/13![Southwest logo]()
$413
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated June 14, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated June 14, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/262:56 pm
STL
- PDX
1 stop6h 51m
Frontier
Mon 6/298:42 pm
PDX
- STL
1 stop20h 09m
Frontier
Deal found 6/12![Frontier logo]()
$354
This Delta deal was found by Cheapflights users on 6/10. 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.
Mon 6/296:21 am
STL
- PDX
1 stop8h 19m
Delta
Fri 7/1012:33 am
PDX
- STL
1 stop7h 55m
Delta
Deal found 6/10![Delta logo]()
$348
This CheapOair deal was found by Cheapflights users on 6/9. 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.
Tue 7/78:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Tue 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
Deal found 6/9![Frontier logo]()
$320
This Booking.com deal was found by Cheapflights users on 6/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/148:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Sun 7/196:49 pm
PDX
- STL
1 stop21h 26m
Frontier
Deal found 6/12![Frontier logo]()
$357
This Delta deal was found by Cheapflights users on 6/10. 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 7/167:55 pm
STL
- PDX
1 stop5h 49m
Delta
Sat 8/16:15 am
PDX
- STL
1 stop8h 31m
Delta
Deal found 6/10![Delta logo]()
$358
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 7/2111:18 am
STL
- PDX
1 stop8h 17m
Delta
Mon 7/2712:33 am
PDX
- STL
1 stop7h 55m
Delta
Deal found 6/10![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 7/215:35 am
STL
- PDX
1 stop6h 35m
Southwest
Tue 7/285:50 am
PDX
- STL
2 stops9h 55m
Southwest
Deal found 6/10![Southwest logo]()
$324
This Delta deal was found by Cheapflights users on 6/9. 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.
Wed 7/227:55 pm
STL
- PDX
1 stop5h 49m
Delta
Tue 7/2812:33 am
PDX
- STL
1 stop6h 13m
Delta
Deal found 6/9![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 6/9. 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.
Wed 7/227:55 pm
STL
- PDX
1 stop5h 49m
Delta
Mon 7/2712:33 am
PDX
- STL
1 stop6h 13m
Delta
Deal found 6/9![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 6/10. 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.
Thu 7/231:20 pm
STL
- PDX
1 stop10h 10m
Southwest
Mon 7/2711:30 pm
PDX
- STL
1 stop8h 05m
Southwest
Deal found 6/10![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 6/11. 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 7/255:35 pm
STL
- PDX
Nonstop4h 05m
Southwest
Tue 7/2811:30 pm
PDX
- STL
1 stop8h 05m
Southwest
Deal found 6/11![Southwest logo]()
$338
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 7/3012:40 pm
STL
- PDX
1 stop8h 20m
Southwest
Fri 8/73:25 pm
PDX
- STL
1 stop6h 25m
Southwest
Deal found 6/9![Southwest logo]()
$341
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 June 14, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated June 14, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 9/86:59 pm
STL
- PDX
1 stop5h 42m
Delta
Deal found 6/10![Delta logo]()
$106
This Southwest deal was found by Cheapflights users on 6/10. 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 8/228:30 am
STL
- PDX
Nonstop4h 10m
Southwest
Deal found 6/10![Southwest logo]()
$116
This Southwest deal was found by Cheapflights users on 6/9. 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 9/25:35 am
STL
- PDX
2 stops11h 50m
Southwest
Deal found 6/9![Southwest logo]()
$117
This Frontier deal was found by Cheapflights users on 6/12. 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 9/1012:46 pm
STL
- PDX
1 stop9h 53m
Frontier
Deal found 6/12![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Mon 8/108:08 pm
STL
- PDX
1 stop22h 23m
Frontier
Deal found 6/10![Frontier logo]()
$121
This Delta deal was found by Cheapflights users on 6/11. 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 8/67:45 pm
STL
- PDX
1 stop5h 54m
Delta
Deal found 6/11![Delta logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Mon 10/198:10 pm
STL
- PDX
1 stop22h 25m
Frontier
Deal found 6/10![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 10/208:10 pm
STL
- PDX
1 stop22h 25m
Frontier
Deal found 6/10![Frontier logo]()
$137
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/215:30 pm
STL
- PDX
1 stop7h 22m
United Airlines
Deal found 6/10![United Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sun 8/97:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/10![Frontier logo]()
$150
This Southwest deal was found by Cheapflights users on 6/11. 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.
Fri 8/216:05 am
STL
- PDX
2 stops10h 55m
Southwest
Deal found 6/11![Southwest logo]()
$152
This Southwest deal was found by Cheapflights users on 6/13. 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.
Mon 9/285:45 am
STL
- PDX
1 stop6h 15m
Southwest
Deal found 6/13![Southwest logo]()
$155
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 June 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $290 (Southwest) |
One-way from | $106 (Delta) |
Popular in | November |
Cheapest in | January |
Average price | $412 |
Good round-trip deal | $396 or less |
Good one-way deal | $164 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 June 14, 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
Sat 11/7
6:35 am-2:40 pm
2 stops10h 05m
Portland
Sat 11/14
6:45 am-4:20 pm
2 stops7h 35m
$313
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 7/7
5:36 pm-11:18 pm
1 stop7h 42m
Portland
Tue 7/14
5:14 pm-12:41 am
1 stop5h 27m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 8/22
7:10 am-11:50 am
1 stop6h 40m
Portland
Wed 9/2
11:30 pm-9:15 am
1 stop7h 45m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 9/9
12:20 pm-7:50 pm
2 stops9h 30m
Portland
Wed 9/16
11:35 am-9:10 pm
2 stops7h 35m
$332
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 9/12
8:50 am-5:49 pm
2 stops10h 59m
Portland
Sat 9/19
5:00 am-12:40 pm
1 stop5h 40m
$356
Quickest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 8/22
6:08 pm-8:20 pm
Nonstop4h 12m
Portland
Fri 8/28
11:16 am-5:10 pm
Nonstop3h 54m
$377
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 9/22
12:20 pm-7:50 pm
2 stops9h 30m
Portland
Tue 9/29
5:50 am-5:50 pm
2 stops10h 00m
$387
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 8/7
6:40 pm-10:45 pm
1 stop6h 05m
Portland
Sat 8/8
9:45 am-3:30 pm
Nonstop3h 45m
$391
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 10/6
7:00 am-1:27 pm
1 stop8h 27m
Portland
Sat 10/10
3:48 pm-11:59 pm
1 stop6h 11m
$397
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 7/1
5:20 pm-10:35 pm
1 stop7h 15m
Portland
Tue 7/14
5:50 am-5:45 pm
2 stops9h 55m
$413
Showing 1-10 of 23 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 June.
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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
Prices
More
How far ahead should I book a flight from St. Louis to Portland?
Booking 58 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 $413). 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 June 14, 2026.
When flying from St. Louis to Portland, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 25% versus a flight at noon.
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.
Denver (DEN) – chosen by Cheapflights users on 50% 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.
Seattle (SEA) is the most affordable 1-stop option, with an average round-trip price of $268.
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 16m.
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 Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 06m.
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 June 14, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Southwest, 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.
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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
Gresham
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St. Louis and Portland flights
Browse other St. Louis and Portland flight options. Last updated on June 14, 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 June 14, 2026.
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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 June 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$149 | Average$285 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$186 | Average$292 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$348 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$228 | Average$402 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$246 | Average$354 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$381 | FlexibilityNo cancel fee | On-time75% |