$65+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Mar 28 — Apr 41
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 52 days in advance, depart on a Monday or Thursday and return on a Monday
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 February 26, 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 February 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 4/188:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Sat 4/2512:27 pm
PDX
- STL
1 stop28h 54m
Frontier
Deal found 2/23![Frontier logo]()
$137
This Delta deal was found by Cheapflights users on 2/23. 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 4/146:45 pm
STL
- PDX
1 stop7h 08m
Delta
Tue 4/215:05 pm
PDX
- STL
1 stop5h 20m
Delta
Deal found 2/23![Delta logo]()
$181
This Southwest deal was found by Cheapflights users on 2/25. 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 5/133:55 pm
STL
- PDX
1 stop8h 05m
Southwest
Mon 5/1811:55 pm
PDX
- STL
1 stop7h 35m
Southwest
Deal found 2/25![Southwest logo]()
$182
This Delta deal was found by Cheapflights users on 2/25. 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 5/137:59 pm
STL
- PDX
1 stop5h 45m
Delta
Mon 5/183:10 pm
PDX
- STL
1 stop6h 11m
Delta
Deal found 2/25![Delta logo]()
$188
This Delta deal was found by Cheapflights users on 2/25. 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 4/11:39 pm
STL
- PDX
1 stop10h 14m
Delta
Wed 4/85:45 am
PDX
- STL
1 stop5h 32m
Delta
Deal found 2/25![Delta logo]()
$189
This Delta deal was found by Cheapflights users on 2/23. 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 4/286:20 am
STL
- PDX
1 stop8h 29m
Delta
Wed 4/2912:30 am
PDX
- STL
1 stop6h 16m
Delta
Deal found 2/23![Delta logo]()
$190
This American Airlines deal was found by Cheapflights users on 2/23. 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.
Tue 4/144:30 pm
STL
- PDX
1 stop9h 27m
American Airlines
Tue 5/1211:40 pm
PDX
- STL
1 stop7h 14m
American Airlines
Deal found 2/23![American Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 2/23. 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 4/176:45 pm
STL
- PDX
1 stop7h 08m
Delta
Tue 4/215:05 pm
PDX
- STL
1 stop5h 20m
Delta
Deal found 2/23![Delta logo]()
$199
This CheapOair deal was found by Cheapflights users on 2/22. 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 4/178:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Mon 4/2011:48 am
PDX
- STL
1 stop5h 44m
Frontier
Deal found 2/22![Frontier logo]()
$201
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 February 26, 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 February 26, 2026.
This Delta deal was found by Cheapflights users on 2/24. 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 4/176:45 pm
STL
- PDX
1 stop7h 08m
Delta
Mon 4/2011:15 pm
PDX
- STL
1 stop8h 27m
Delta
Deal found 2/24![Delta logo]()
$208
This Alaska Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Mon 5/185:46 pm
PDX
- STL
1 stop22h 59m
Alaska Airlines
Deal found 2/25![Alaska Airlines logo]()
$241
This United Airlines deal was found by Cheapflights users on 2/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/185:10 am
STL
- PDX
1 stop6h 37m
United Airlines
Wed 6/244:15 pm
PDX
- STL
1 stop5h 42m
United Airlines
Deal found 2/22![United Airlines logo]()
$314
This Alaska Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:33 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 8/1510:45 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 2/25![Alaska Airlines logo]()
$269
This Delta deal was found by Cheapflights users on 2/24. 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 4/106:12 pm
STL
- PDX
1 stop7h 42m
Delta
Fri 4/177:32 pm
PDX
- STL
2 stops12h 16m
Delta
Deal found 2/24![Delta logo]()
$295
This Delta deal was found by Cheapflights users on 2/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:59 pm
STL
- PDX
1 stop5h 45m
Delta
Mon 5/188:11 pm
PDX
- STL
2 stops10h 35m
Delta
Deal found 2/22![Delta logo]()
$301
This Alaska Airlines deal was found by Cheapflights users on 2/25. 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.
Sun 8/97:56 pm
STL
- PDX
1 stop6h 26m
Alaska Airlines
Sat 8/155:00 am
PDX
- STL
1 stop6h 55m
Alaska Airlines
Deal found 2/25![Alaska Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 2/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:21 am
STL
- PDX
1 stop8h 09m
Delta
Mon 6/15:05 pm
PDX
- STL
1 stop5h 25m
Delta
Deal found 2/22![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 2/24. 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 6/279:30 pm
PDX
- STL
1 stop14h 25m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 2/23. 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.
Sun 7/125:33 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 7/2510:45 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 2/24. 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 5/277:59 pm
STL
- PDX
2 stops14h 38m
Delta
Fri 6/55:51 pm
PDX
- STL
2 stops14h 41m
Delta
Deal found 2/24![Delta logo]()
$376
This Alaska Airlines deal was found by Cheapflights users on 2/22. 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.
Thu 6/187:56 pm
STL
- PDX
1 stop6h 26m
Alaska Airlines
Sun 7/510:45 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 2/22![Alaska Airlines logo]()
$367
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated February 26, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated February 26, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/25. 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 3/188:12 pm
STL
- PDX
1 stop16h 57m
Frontier
Mon 3/239:53 pm
PDX
- STL
2 stops33h 56m
Frontier
Deal found 2/25![Frontier logo]()
$217
This American Airlines deal was found by Cheapflights users on 2/23. 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.
Fri 3/206:40 pm
STL
- PDX
1 stop7h 35m
American Airlines
Tue 3/2411:59 pm
PDX
- STL
1 stop6h 52m
American Airlines
Deal found 2/23![American Airlines logo]()
$268
This Delta deal was found by Cheapflights users on 2/24. 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 3/221:39 pm
STL
- PDX
1 stop10h 14m
Delta
Mon 3/305:02 pm
PDX
- STL
1 stop5h 19m
Delta
Deal found 2/24![Delta logo]()
$237
This Expedia deal was found by Cheapflights users on 2/22. 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 Expedia 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
Sun 3/2912:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/22![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 2/23. 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 2/23![Frontier logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 3/235:46 pm
STL
- PDX
1 stop17h 12m
Frontier
Mon 3/3012:52 pm
PDX
- STL
1 stop20h 27m
Frontier
Deal found 2/23![Frontier logo]()
$252
This Delta deal was found by Cheapflights users on 2/24. 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 3/243:05 pm
STL
- PDX
1 stop7h 20m
Delta
Tue 3/311:45 pm
PDX
- STL
1 stop8h 36m
Delta
Deal found 2/24![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 2/24. 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 3/245:15 am
STL
- PDX
2 stops9h 18m
United Airlines
Mon 4/610:56 pm
PDX
- STL
1 stop7h 29m
United Airlines
Deal found 2/24![United Airlines logo]()
$242
This CheapOair deal was found by Cheapflights users on 2/25. 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 3/258:12 pm
STL
- PDX
1 stop16h 57m
Frontier
Mon 3/3012:52 pm
PDX
- STL
1 stop20h 27m
Frontier
Deal found 2/25![Frontier logo]()
$275
This United Airlines deal was found by Cheapflights users on 2/25. 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 3/255:15 am
STL
- PDX
2 stops9h 18m
United Airlines
Wed 4/12:15 pm
PDX
- STL
1 stop6h 41m
United Airlines
Deal found 2/25![United Airlines logo]()
$276
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 February 26, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated February 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 4/258:17 pm
STL
- PDX
1 stop16h 03m
Frontier
Deal found 2/23![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 2/24. 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 2/24![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 3/218:12 pm
STL
- PDX
1 stop16h 57m
Frontier
Deal found 2/23![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 2/24. 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 4/248:06 pm
STL
- PDX
1 stop17h 36m
Frontier
Deal found 2/24![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Thu 4/239:55 pm
STL
- PDX
1 stop13h 04m
Frontier
Deal found 2/26![Frontier logo]()
$88
This Delta deal was found by Cheapflights users on 2/24. 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 4/226:45 pm
STL
- PDX
1 stop7h 08m
Delta
Deal found 2/24![Delta logo]()
$91
This Delta deal was found by Cheapflights users on 2/23. 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 3/2412:28 pm
STL
- PDX
1 stop7h 11m
Delta
Deal found 2/23![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 2/24. 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 4/206:45 pm
STL
- PDX
1 stop7h 08m
Delta
Deal found 2/24![Delta logo]()
$100
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 February 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (Kiwi.com) |
One-way from | $65 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $390 |
Good round-trip deal | $298 or less |
Good one-way deal | $114 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 February 26, 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
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/17
6:45 pm-11:53 pm
1 stop7h 08m
Portland
Mon 4/20
11:15 pm-9:42 am
1 stop8h 27m
$208
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 5/13
5:33 pm-7:50 pm
Nonstop4h 17m
Portland
Mon 5/18
5:46 pm-6:45 pm
1 stop22h 59m
$241
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 8/5
5:33 pm-7:43 pm
Nonstop4h 10m
Portland
Sat 8/15
10:45 am-4:33 pm
Nonstop3h 48m
$269
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/10
6:12 pm-11:54 pm
1 stop7h 42m
Portland
Fri 4/17
7:32 pm-9:48 am
2 stops12h 16m
$295
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 5/12
7:59 pm-11:44 pm
1 stop5h 45m
Portland
Mon 5/18
8:11 pm-8:46 am
2 stops10h 35m
$301
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sun 8/9
7:56 pm-12:22 am
1 stop6h 26m
Portland
Sat 8/15
5:00 am-1:55 pm
1 stop6h 55m
$307
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 5/29
6:21 am-12:30 pm
1 stop8h 09m
Portland
Mon 6/1
5:05 pm-12:30 am
1 stop5h 25m
$307
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 6/18
5:10 am-9:47 am
1 stop6h 37m
Portland
Wed 6/24
4:15 pm-11:57 pm
1 stop5h 42m
$314
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 6/20
5:33 pm-7:43 pm
Nonstop4h 10m
Portland
Sat 6/27
9:30 pm-1:55 pm
1 stop14h 25m
$318
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sun 7/12
5:33 pm-7:43 pm
Nonstop4h 10m
Portland
Sat 7/25
10:45 am-4:33 pm
Nonstop3h 48m
$327
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 February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Portland flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Portland flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Portland flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.
STL-PDX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Portland
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How far ahead should I book a flight from St. Louis to Portland?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Portland. Price data was last updated on February 20, 2026.
Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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’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 February 26, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta 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
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Food
7.1
Crew
8.5
Comfort
7.8
Overall
8.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
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
Beaverton
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
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 February 26, 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 February 26, 2026.
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Other flights to Portland
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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 February 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$247 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$188 | Average$324 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$204 | Average$394 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$204 | Average$315 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$238 | Average$362 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$248 | Average$366 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$338 | Average$520 | FlexibilityNo cancel fee | On-time85% |