$128+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Jun 17 — Jun 241
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
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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 Wednesday
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 May 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 May 18, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:59 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Tue 9/1511:15 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$299
This Expedia deal was found by Cheapflights users on 5/13. 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.
Fri 9/255:59 pm
STL
- PDX
Nonstop4h 10m
Multiple Airlines
Sun 10/43:22 pm
PDX
- STL
1 stop25h 53m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$300
This Mytrip deal was found by Cheapflights users on 5/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:21 pm
STL
- PDX
1 stop23h 03m
Frontier
Mon 8/316:19 pm
PDX
- STL
1 stop21h 49m
Frontier
Deal found 5/14![Frontier logo]()
$307
This Southwest deal was found by Cheapflights users on 5/16. 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 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
Sun 8/3011:30 pm
PDX
- STL
1 stop9h 00m
Southwest
Deal found 5/16![Southwest logo]()
$309
This Expedia deal was found by Cheapflights users on 5/13. 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.
Fri 9/258:10 pm
STL
- PDX
1 stop22h 25m
Frontier
Sun 10/43:22 pm
PDX
- STL
1 stop25h 53m
Frontier
Deal found 5/13![Frontier logo]()
$310
This Booking.com deal was found by Cheapflights users on 5/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:46 pm
STL
- PDX
1 stop26h 01m
Frontier
Mon 6/228:42 pm
PDX
- STL
1 stop20h 09m
Frontier
Deal found 5/14![Frontier logo]()
$311
This Southwest deal was found by Cheapflights users on 5/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:45 am
STL
- PDX
1 stop6h 15m
Southwest
Sun 8/3011:30 pm
PDX
- STL
1 stop9h 00m
Southwest
Deal found 5/14![Southwest logo]()
$314
This Booking.com deal was found by Cheapflights users on 5/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Mon 6/811:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/15![Frontier logo]()
$317
This American Airlines deal was found by Cheapflights users on 5/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:03 pm
STL
- PDX
1 stop9h 17m
American Airlines
Mon 6/811:43 pm
PDX
- STL
1 stop7h 07m
American Airlines
Deal found 5/14![American Airlines logo]()
$318
This Delta deal was found by Cheapflights users on 5/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:10 pm
STL
- PDX
1 stop9h 59m
Delta
Sun 8/303:28 pm
PDX
- STL
1 stop5h 58m
Delta
Deal found 5/16![Delta logo]()
$319
This Booking.com deal was found by Cheapflights users on 5/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:38 pm
STL
- PDX
1 stop22h 57m
Frontier
Fri 6/268:42 pm
PDX
- STL
1 stop15h 24m
Frontier
Deal found 5/17![Frontier logo]()
$320
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 May 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 May 18, 2026.
This Delta deal was found by Cheapflights users on 5/17. 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.
Fri 7/311:18 am
STL
- PDX
1 stop8h 19m
Delta
Thu 7/912:33 am
PDX
- STL
1 stop7h 55m
Delta
Deal found 5/17![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/277:23 pm
STL
- PDX
1 stop7h 27m
United Airlines
Wed 7/111:40 pm
PDX
- STL
1 stop6h 54m
United Airlines
Deal found 5/14![United Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 9/125:59 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 9/196:05 am
PDX
- STL
1 stop6h 16m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 5/18. 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 6/205:35 pm
STL
- PDX
Nonstop4h 05m
Southwest
Wed 6/2411:30 pm
PDX
- STL
1 stop7h 40m
Southwest
Deal found 5/18![Southwest logo]()
$408
This Delta deal was found by Cheapflights users on 5/14. 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.
Sat 6/206:21 am
STL
- PDX
1 stop8h 19m
Delta
Wed 7/812:33 am
PDX
- STL
1 stop7h 55m
Delta
Deal found 5/14![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/13. 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 7/85:10 am
STL
- PDX
1 stop6h 37m
United Airlines
Sun 7/1211:40 pm
PDX
- STL
1 stop6h 54m
United Airlines
Deal found 5/13![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/18. 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 11/127:55 pm
STL
- PDX
1 stop5h 56m
Delta
Sun 11/153:10 pm
PDX
- STL
1 stop6h 08m
Delta
Deal found 5/18![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:30 pm
STL
- PDX
1 stop7h 25m
Southwest
Sun 8/22:50 pm
PDX
- STL
2 stops8h 05m
Southwest
Deal found 5/17![Southwest logo]()
$434
This Alaska Airlines deal was found by Cheapflights users on 5/17. 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.
Thu 7/305:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Mon 8/310:49 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 5/17![Alaska Airlines logo]()
$443
This Southwest deal was found by Cheapflights users on 5/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:05 am
STL
- PDX
2 stops10h 55m
Southwest
Mon 8/179:20 am
PDX
- STL
2 stops11h 45m
Southwest
Deal found 5/17![Southwest logo]()
$455
This CheapOair deal was found by Cheapflights users on 5/18. 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 6/235:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sun 7/1210:49 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 5/18![Alaska Airlines logo]()
$456
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated May 18, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated May 18, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 5/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/299:06 pm
STL
- PDX
1 stop15h 28m
Frontier
Thu 6/411:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/15![Frontier logo]()
$332
This Booking.com deal was found by Cheapflights users on 5/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:08 pm
STL
- PDX
1 stop22h 53m
Frontier
Sat 6/612:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Deal found 5/16![Frontier logo]()
$337
This Expedia deal was found by Cheapflights users on 5/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Mon 6/811:15 am
PDX
- STL
1 stop6h 56m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$299
This Booking.com deal was found by Cheapflights users on 5/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Mon 6/811:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/15![Frontier logo]()
$317
This American Airlines deal was found by Cheapflights users on 5/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:03 pm
STL
- PDX
1 stop9h 17m
American Airlines
Mon 6/811:43 pm
PDX
- STL
1 stop7h 07m
American Airlines
Deal found 5/14![American Airlines logo]()
$318
This Expedia deal was found by Cheapflights users on 5/14. 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.
Sat 6/65:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Mon 6/811:15 am
PDX
- STL
1 stop6h 56m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$324
This Booking.com deal was found by Cheapflights users on 5/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:46 pm
STL
- PDX
1 stop26h 01m
Frontier
Mon 6/228:42 pm
PDX
- STL
1 stop20h 09m
Frontier
Deal found 5/14![Frontier logo]()
$311
This Delta deal was found by Cheapflights users on 5/14. 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.
Sat 6/206:21 am
STL
- PDX
1 stop8h 19m
Delta
Wed 7/812:33 am
PDX
- STL
1 stop7h 55m
Delta
Deal found 5/14![Delta logo]()
$319
This Booking.com deal was found by Cheapflights users on 5/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:38 pm
STL
- PDX
1 stop22h 57m
Frontier
Fri 6/268:42 pm
PDX
- STL
1 stop15h 24m
Frontier
Deal found 5/17![Frontier logo]()
$320
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 May 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 May 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 6/125:06 pm
STL
- PDX
2 stops46h 42m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$128
This Trip.com deal was found by Cheapflights users on 5/14. 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.
Wed 6/107:03 pm
STL
- PDX
1 stop26h 44m
Frontier
Deal found 5/14![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:27 pm
STL
- PDX
2 stops22h 21m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$143
This Trip.com deal was found by Cheapflights users on 5/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:08 pm
STL
- PDX
1 stop22h 27m
Frontier
Deal found 5/17![Frontier logo]()
$146
This Booking.com deal was found by Cheapflights users on 5/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:03 pm
STL
- PDX
1 stop25h 01m
Frontier
Deal found 5/16![Frontier logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 5/13. 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 6/65:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$149
This Southwest deal was found by Cheapflights users on 5/18. 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 6/135:35 pm
STL
- PDX
Nonstop4h 05m
Southwest
Deal found 5/18![Southwest logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 5/14. 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.
Mon 6/88:08 pm
STL
- PDX
1 stop22h 27m
Frontier
Deal found 5/14![Frontier logo]()
$151
This Trip.com deal was found by Cheapflights users on 5/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/79:06 pm
STL
- PDX
1 stop15h 14m
Frontier
Deal found 5/13![Frontier logo]()
$153
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 May 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (Expedia) |
One-way from | $128 (Kiwi.com) |
Popular in | November |
Cheapest in | January |
Average price | $353 |
Good round-trip deal | $332 or less |
Good one-way deal | $149 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 May 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 7/3
11:18 am-5:37 pm
1 stop8h 19m
Portland
Thu 7/9
12:33 am-10:28 am
1 stop7h 55m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/27
7:23 pm-12:50 am
1 stop7h 27m
Portland
Wed 7/1
11:40 pm-8:34 am
1 stop6h 54m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/20
6:21 am-12:40 pm
1 stop8h 19m
Portland
Wed 7/8
12:33 am-10:28 am
1 stop7h 55m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 7/8
5:10 am-9:47 am
1 stop6h 37m
Portland
Sun 7/12
11:40 pm-8:34 am
1 stop6h 54m
$339
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 11/12
7:55 pm-11:51 pm
1 stop5h 56m
Portland
Sun 11/15
3:10 pm-11:18 pm
1 stop6h 08m
$339
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 9/12
5:59 pm-8:09 pm
Nonstop4h 10m
Portland
Sat 9/19
6:05 am-2:21 pm
1 stop6h 16m
$388
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/20
5:35 pm-7:40 pm
Nonstop4h 05m
Portland
Wed 6/24
11:30 pm-9:10 am
1 stop7h 40m
$408
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 7/31
6:30 pm-11:55 pm
1 stop7h 25m
Portland
Sun 8/2
2:50 pm-12:55 am
2 stops8h 05m
$434
Quickest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 7/30
5:37 pm-7:47 pm
Nonstop4h 10m
Portland
Mon 8/3
10:49 am-4:37 pm
Nonstop3h 48m
$443
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 8/13
6:05 am-3:00 pm
2 stops10h 55m
Portland
Mon 8/17
9:20 am-11:05 pm
2 stops11h 45m
$455
Showing 1-10 of 22 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 May.
| 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 | |
| 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
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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 $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 May 18, 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.
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 May 18, 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.
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
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 May 18, 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 May 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$261 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$186 | Average$313 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$222 | Average$343 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$228 | Average$399 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$366 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$355 | FlexibilityNo cancel fee | On-time75% |