$86+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Apr 22 — Apr 291
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 66 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 March 23, 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 March 23, 2026.
This CheapOair deal was found by Cheapflights users on 3/19. 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
Mon 5/188:46 pm
PDX
- STL
1 stop19h 20m
Frontier
Deal found 3/19![Frontier logo]()
$196
This Southwest deal was found by Cheapflights users on 3/22. 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 4/211:45 pm
STL
- PDX
2 stops9h 00m
Southwest
Tue 4/2811:55 pm
PDX
- STL
1 stop7h 35m
Southwest
Deal found 3/22![Southwest logo]()
$206
This CheapOair deal was found by Cheapflights users on 3/22. 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
Mon 6/16:19 pm
PDX
- STL
1 stop21h 47m
Frontier
Deal found 3/22![Frontier logo]()
$241
This Southwest deal was found by Cheapflights users on 3/22. 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 5/273:55 pm
STL
- PDX
1 stop9h 15m
Southwest
Wed 6/32:35 pm
PDX
- STL
1 stop6h 40m
Southwest
Deal found 3/22![Southwest logo]()
$257
This CheapOair deal was found by Cheapflights users on 3/20. 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 5/288:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Mon 6/16:19 pm
PDX
- STL
1 stop21h 47m
Frontier
Deal found 3/20![Frontier logo]()
$261
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Fri 4/1711:48 am
PDX
- STL
1 stop5h 33m
Frontier
Deal found 3/18![Frontier logo]()
$270
This CheapOair deal was found by Cheapflights users on 3/20. 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.
Sun 3/2210:47 pm
STL
- PDX
1 stop12h 11m
Frontier
Mon 3/3012:52 pm
PDX
- STL
1 stop20h 27m
Frontier
Deal found 3/20![Frontier logo]()
$271
This CheapOair deal was found by Cheapflights users on 3/18. 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 5/195:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Fri 5/2210:37 am
PDX
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$273
This United Airlines deal was found by Cheapflights users on 3/20. 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 4/149:10 am
STL
- PDX
1 stop7h 59m
United Airlines
Sat 4/2511:59 pm
PDX
- STL
1 stop6h 26m
United Airlines
Deal found 3/20![United Airlines logo]()
$277
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 March 23, 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 March 23, 2026.
This Southwest deal was found by Cheapflights users on 3/22. 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 5/193:55 pm
STL
- PDX
1 stop8h 05m
Southwest
Tue 5/2611:55 pm
PDX
- STL
1 stop7h 35m
Southwest
Deal found 3/22![Southwest logo]()
$261
This Delta deal was found by Cheapflights users on 3/19. 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 5/293:11 pm
STL
- PDX
1 stop7h 00m
Delta
Mon 6/13:10 pm
PDX
- STL
1 stop6h 11m
Delta
Deal found 3/19![Delta logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 3/22. 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 6/205:33 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 6/2710:45 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:10 am
STL
- PDX
1 stop6h 38m
United Airlines
Mon 7/1311:40 pm
PDX
- STL
1 stop7h 01m
United Airlines
Deal found 3/18![United Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 3/20. 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 4/155:30 am
STL
- PDX
2 stops10h 20m
Southwest
Wed 4/2912:45 pm
PDX
- STL
2 stops8h 25m
Southwest
Deal found 3/20![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 3/19. 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.
Sun 6/282:18 pm
STL
- PDX
1 stop9h 28m
Delta
Thu 7/212:40 am
PDX
- STL
1 stop6h 00m
Delta
Deal found 3/19![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 3/19. 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 4/162:20 pm
STL
- PDX
1 stop5h 48m
Delta
Mon 4/201:55 pm
PDX
- STL
1 stop7h 18m
Delta
Deal found 3/19![Delta logo]()
$334
This Southwest deal was found by Cheapflights users on 3/22. 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 5/215:45 am
STL
- PDX
2 stops12h 35m
Southwest
Mon 5/2511:55 pm
PDX
- STL
1 stop7h 35m
Southwest
Deal found 3/22![Southwest logo]()
$364
This Delta deal was found by Cheapflights users on 3/18. 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.
Fri 5/157:59 pm
STL
- PDX
1 stop5h 45m
Delta
Tue 5/198:11 pm
PDX
- STL
2 stops10h 35m
Delta
Deal found 3/18![Delta logo]()
$348
This Southwest deal was found by Cheapflights users on 3/21. 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 7/236:30 pm
STL
- PDX
1 stop7h 25m
Southwest
Mon 8/35:30 am
PDX
- STL
1 stop8h 35m
Southwest
Deal found 3/21![Southwest logo]()
$371
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated March 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated March 23, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/20. 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.
Sun 3/2210:47 pm
STL
- PDX
1 stop12h 11m
Frontier
Mon 3/3012:52 pm
PDX
- STL
1 stop20h 27m
Frontier
Deal found 3/20![Frontier logo]()
$271
This CheapOair deal was found by Cheapflights users on 3/20. 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 3/2512:14 pm
STL
- PDX
1 stop22h 59m
Frontier
Mon 3/3012:52 pm
PDX
- STL
1 stop20h 27m
Frontier
Deal found 3/20![Frontier logo]()
$306
This CheapOair deal was found by Cheapflights users on 3/19. 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.
Mon 4/138:19 pm
STL
- PDX
1 stop18h 43m
Frontier
Mon 4/2711:48 am
PDX
- STL
1 stop5h 44m
Frontier
Deal found 3/19![Frontier logo]()
$216
This CheapOair deal was found by Cheapflights users on 3/18. 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.
Mon 4/138:19 pm
STL
- PDX
1 stop18h 43m
Frontier
Fri 4/1711:48 am
PDX
- STL
1 stop5h 33m
Frontier
Deal found 3/18![Frontier logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:19 pm
STL
- PDX
1 stop18h 43m
Frontier
Thu 4/1611:48 am
PDX
- STL
1 stop29h 33m
Frontier
Deal found 3/18![Frontier logo]()
$287
This United Airlines deal was found by Cheapflights users on 3/20. 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 4/149:10 am
STL
- PDX
1 stop7h 59m
United Airlines
Sat 4/2511:59 pm
PDX
- STL
1 stop6h 26m
United Airlines
Deal found 3/20![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 3/18. 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.
Wed 4/156:45 pm
STL
- PDX
1 stop7h 08m
Delta
Thu 4/165:05 pm
PDX
- STL
1 stop5h 20m
Delta
Deal found 3/18![Delta logo]()
$293
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Fri 4/1711:48 am
PDX
- STL
1 stop5h 33m
Frontier
Deal found 3/18![Frontier logo]()
$270
This Expedia deal was found by Cheapflights users on 3/20. 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 4/168:06 pm
STL
- PDX
1 stop16h 57m
Multiple Airlines
Tue 4/2110:31 am
PDX
- STL
1 stop11h 26m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$295
This United Airlines deal was found by Cheapflights users on 3/21. 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 4/189:16 am
STL
- PDX
2 stops10h 29m
United Airlines
Sat 4/255:00 am
PDX
- STL
1 stop6h 08m
United Airlines
Deal found 3/21![United Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 3/22. 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 4/211:45 pm
STL
- PDX
2 stops9h 00m
Southwest
Tue 4/2811:55 pm
PDX
- STL
1 stop7h 35m
Southwest
Deal found 3/22![Southwest logo]()
$206
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 March 23, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated March 23, 2026.
This Frontier deal was found by Cheapflights users on 3/22. 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 4/239:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Deal found 3/22![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 3/22. 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.
Mon 4/278:17 pm
STL
- PDX
1 stop17h 35m
Frontier
Deal found 3/22![Frontier logo]()
$88
This Trip.com deal was found by Cheapflights users on 3/22. 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.
Mon 4/138:19 pm
STL
- PDX
1 stop18h 43m
Frontier
Deal found 3/22![Frontier logo]()
$89
This Southwest deal was found by Cheapflights users on 3/22. 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 4/225:45 am
STL
- PDX
1 stop7h 20m
Southwest
Deal found 3/22![Southwest logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:17 pm
STL
- PDX
1 stop17h 35m
Frontier
Deal found 3/18![Frontier logo]()
$109
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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 5/195:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$129
This Frontier deal was found by Cheapflights users on 3/19. 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 4/169:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Deal found 3/19![Frontier logo]()
$131
This Trip.com deal was found by Cheapflights users on 3/20. 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 5/206:51 pm
STL
- PDX
1 stop24h 33m
Frontier
Deal found 3/20![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 4/249:58 pm
STL
- PDX
2 stops15h 44m
Frontier
Deal found 3/22![Frontier logo]()
$136
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 March 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $196 (CheapOair) |
One-way from | $86 (Frontier) |
Popular in | March |
Cheapest in | January |
Average price | $472 |
Good round-trip deal | $277 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 March 23, 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
Tue 5/19
3:55 pm-10:00 pm
1 stop8h 05m
Portland
Tue 5/26
11:55 pm-9:30 am
1 stop7h 35m
$261
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/29
3:11 pm-8:11 pm
1 stop7h 00m
Portland
Mon 6/1
3:10 pm-11:21 pm
1 stop6h 11m
$309
Quickest round-trip
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/20
5:33 pm-7:43 pm
Nonstop4h 10m
Portland
Sat 6/27
10:45 am-4:33 pm
Nonstop3h 48m
$329
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 4/15
5:30 am-1:50 pm
2 stops10h 20m
Portland
Wed 4/29
12:45 pm-11:10 pm
2 stops8h 25m
$332
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sun 6/28
2:18 pm-9:46 pm
1 stop9h 28m
Portland
Thu 7/2
12:40 am-8:40 am
1 stop6h 00m
$334
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 4/16
2:20 pm-6:08 pm
1 stop5h 48m
Portland
Mon 4/20
1:55 pm-11:13 pm
1 stop7h 18m
$334
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/15
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Tue 5/19
8:11 pm-8:46 am
2 stops10h 35m
$348
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 5/21
5:45 am-4:20 pm
2 stops12h 35m
Portland
Mon 5/25
11:55 pm-9:30 am
1 stop7h 35m
$364
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 7/23
6:30 pm-11:55 pm
1 stop7h 25m
Portland
Mon 8/3
5:30 am-4:05 pm
1 stop8h 35m
$371
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 7/4
5:10 am-9:48 am
1 stop6h 38m
Portland
Mon 7/13
11:40 pm-8:41 am
1 stop7h 01m
$399
Showing 1-10 of 21 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 March.
| 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.
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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 March 13, 2026.
Booking 66 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 $165). Flying from St. Louis to Portland in March is currently the most expensive (average of $248). 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 March 23, 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 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.
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 Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 6h 05m.
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 Chicago (MDW) offer the fastest connection on this route, with an average layover time of 0h 48m.
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 March 23, 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.
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
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 locationsVancouver
Seaside
Clackamas
Lincoln City
Longview
Lake Oswego
Hillsboro
Troutdale
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
Beaverton
Depoe Bay
Wilsonville
Stevenson
Tillamook
Pacific City
Astoria
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St. Louis and Portland flights
Browse other St. Louis and Portland flight options. Last updated on March 23, 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 March 23, 2026.
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Top 7 airlines flying from St. Louis to Portland
Discover the top 7 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 March 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$149 | Average$250 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$188 | Average$323 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$317 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$226 | Average$384 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$228 | Average$355 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$346 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$338 | Average$472 | FlexibilityNo cancel fee | On-time85% |