$100+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Mar 5 — Mar 121
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 September or February, booked 52 days in advance, depart on a Monday or Wednesday 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 3, 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 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/118:12 pm
STL
- PDX
1 stop16h 57m
Frontier
Sun 3/1512:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:19 pm
STL
- PDX
1 stop16h 54m
Frontier
Fri 3/1312:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/68:12 pm
STL
- PDX
2 stops40h 40m
Frontier
Fri 3/1312:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$207
This CheapOair deal was found by Cheapflights users on 2/1. 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 4/208:12 pm
STL
- PDX
1 stop18h 50m
Frontier
Wed 4/221:48 pm
PDX
- STL
1 stop27h 24m
Frontier
Deal found 2/1![Frontier logo]()
$222
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 9/126:20 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 9/1911:25 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$229
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 5/166:20 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Sun 5/245:00 am
PDX
- STL
1 stop8h 50m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$239
This American Airlines deal was found by Cheapflights users on 2/1. 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 9/126:06 am
STL
- PDX
1 stop9h 58m
American Airlines
Sat 9/1911:45 am
PDX
- STL
1 stop9h 35m
American Airlines
Deal found 2/1![American Airlines logo]()
$243
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:59 pm
STL
- PDX
1 stop6h 55m
United Airlines
Sat 5/162:24 pm
PDX
- STL
1 stop6h 35m
United Airlines
Deal found 2/2![United Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 2/2. 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 2/284:30 pm
STL
- PDX
1 stop6h 45m
United Airlines
Fri 3/64:03 pm
PDX
- STL
1 stop5h 31m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/147:05 am
STL
- PDX
1 stop7h 19m
American Airlines
Tue 4/211:14 pm
PDX
- STL
1 stop8h 32m
American Airlines
Deal found 2/2![American Airlines logo]()
$257
This CheapOair deal was found by Cheapflights users on 2/1. 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 5/156:20 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Fri 5/2212:00 pm
PDX
- STL
1 stop9h 57m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$259
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 3, 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 3, 2026.
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/56:02 pm
STL
- PDX
1 stop6h 57m
United Airlines
Wed 3/118:30 am
PDX
- STL
1 stop6h 19m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 2/1. 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 3/256:12 pm
STL
- PDX
1 stop7h 42m
Delta
Mon 3/3011:15 pm
PDX
- STL
1 stop8h 31m
Delta
Deal found 2/1![Delta logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/178:12 pm
STL
- PDX
1 stop17h 30m
Frontier
Wed 4/221:48 pm
PDX
- STL
2 stops18h 42m
Frontier
Deal found 2/2![Frontier logo]()
$292
This United Airlines deal was found by Cheapflights users on 2/2. 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 2/2411:25 am
STL
- PDX
1 stop9h 24m
United Airlines
Fri 2/2710:38 pm
PDX
- STL
1 stop10h 20m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 2/1. 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 4/205:05 pm
PDX
- STL
1 stop5h 20m
Delta
Deal found 2/1![Delta logo]()
$249
This United Airlines deal was found by Cheapflights users on 2/2. 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 2/284:30 pm
STL
- PDX
1 stop6h 45m
United Airlines
Fri 3/64:03 pm
PDX
- STL
1 stop5h 31m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 2/1. 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 4/76:12 pm
STL
- PDX
1 stop7h 42m
Delta
Sat 4/1112:30 am
PDX
- STL
1 stop6h 31m
Delta
Deal found 2/1![Delta logo]()
$249
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:05 pm
STL
- PDX
1 stop6h 49m
United Airlines
Wed 4/227:00 am
PDX
- STL
1 stop7h 08m
United Airlines
Deal found 2/2![United Airlines logo]()
$275
This Delta deal was found by Cheapflights users on 2/2. 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 4/72:12 pm
STL
- PDX
2 stops8h 47m
Delta
Mon 4/135:05 pm
PDX
- STL
1 stop5h 20m
Delta
Deal found 2/2![Delta logo]()
$281
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/36:25 am
STL
- PDX
2 stops9h 19m
United Airlines
Tue 3/101:00 pm
PDX
- STL
1 stop5h 41m
United Airlines
Deal found 2/1![United Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 2/2. 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 4/246:45 pm
STL
- PDX
1 stop7h 08m
Delta
Sat 5/25:30 am
PDX
- STL
2 stops9h 20m
Delta
Deal found 2/2![Delta logo]()
$281
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 3/95:15 am
STL
- PDX
1 stop6h 39m
United Airlines
Sat 3/1411:59 pm
PDX
- STL
1 stop8h 37m
United Airlines
Deal found 2/2![United Airlines logo]()
$293
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated February 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/1. 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 2/179:55 am
STL
- PDX
1 stop7h 32m
United Airlines
Thu 2/265:05 am
PDX
- STL
1 stop6h 09m
United Airlines
Deal found 2/1![United Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 2/2. 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 2/284:30 pm
STL
- PDX
1 stop6h 45m
United Airlines
Fri 3/64:03 pm
PDX
- STL
1 stop5h 31m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/282:51 pm
STL
- PDX
2 stops29h 15m
Multiple Airlines
Fri 3/612:04 pm
PDX
- STL
1 stop19h 45m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/36:25 am
STL
- PDX
2 stops9h 19m
United Airlines
Tue 3/101:00 pm
PDX
- STL
1 stop5h 41m
United Airlines
Deal found 2/1![United Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/68:12 pm
STL
- PDX
2 stops40h 40m
Frontier
Fri 3/1312:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/78:12 pm
STL
- PDX
1 stop15h 57m
Frontier
Mon 3/912:52 pm
PDX
- STL
1 stop28h 19m
Frontier
Deal found 2/3![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:19 pm
STL
- PDX
1 stop16h 54m
Frontier
Fri 3/1312:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/118:12 pm
STL
- PDX
1 stop16h 57m
Frontier
Sun 3/1512:04 pm
PDX
- STL
1 stop19h 45m
Frontier
Deal found 2/2![Frontier logo]()
$199
This Delta deal was found by Cheapflights users on 2/3. 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 3/236:12 pm
STL
- PDX
1 stop7h 42m
Delta
Wed 3/255:02 pm
PDX
- STL
1 stop5h 19m
Delta
Deal found 2/3![Delta logo]()
$277
This Delta deal was found by Cheapflights users on 2/1. 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 3/256:12 pm
STL
- PDX
1 stop7h 42m
Delta
Mon 3/301:55 pm
PDX
- STL
2 stops7h 30m
Delta
Deal found 2/1![Delta logo]()
$281
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 3, 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 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 4/138:16 pm
STL
- PDX
1 stop18h 46m
Frontier
Deal found 2/1![Frontier logo]()
$100
This Expedia deal was found by Cheapflights users on 2/1. 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 4/238:12 pm
STL
- PDX
1 stop16h 51m
Frontier
Deal found 2/1![Frontier logo]()
$101
This CheapOair deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:12 pm
STL
- PDX
1 stop16h 51m
Frontier
Deal found 2/2![Frontier logo]()
$107
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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 7/296:20 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 5/49:55 pm
STL
- PDX
2 stops17h 07m
Frontier
Deal found 2/2![Frontier logo]()
$118
This Delta deal was found by Cheapflights users on 2/2. 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 2/272:22 pm
STL
- PDX
1 stop5h 54m
Delta
Deal found 2/2![Delta logo]()
$125
This CheapOair deal was found by Cheapflights users on 2/3. 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 2/2610:11 pm
STL
- PDX
1 stop22h 32m
Frontier
Deal found 2/3![Frontier logo]()
$128
This Delta deal was found by Cheapflights users on 2/3. 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 2/287:00 am
STL
- PDX
1 stop7h 25m
Delta
Deal found 2/3![Delta logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/3011:21 am
STL
- PDX
2 stops25h 42m
Frontier
Deal found 2/2![Frontier logo]()
$130
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 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $167 (Kiwi.com) |
One-way from | $100 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $310 |
Good round-trip deal | $299 or less |
Good one-way deal | $214 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 3, 2026.
Use the filters below to find and compare flights from St. Louis to Portland that are best for you.
Fly from
St. Louis
Fly to
Portland
Route
Depart
Return
Price
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 3/5
6:02 pm-10:59 pm
1 stop6h 57m
Portland
Wed 3/11
8:30 am-4:49 pm
1 stop6h 19m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Wed 3/25
6:12 pm-11:54 pm
1 stop7h 42m
Portland
Mon 3/30
11:15 pm-9:46 am
1 stop8h 31m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 2/24
11:25 am-6:49 pm
1 stop9h 24m
Portland
Fri 2/27
10:38 pm-10:58 am
1 stop10h 20m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/17
6:45 pm-11:53 pm
1 stop7h 08m
Portland
Mon 4/20
5:05 pm-12:25 am
1 stop5h 20m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Sat 2/28
4:30 pm-9:15 pm
1 stop6h 45m
Portland
Fri 3/6
4:03 pm-11:34 pm
1 stop5h 31m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 4/7
6:12 pm-11:54 pm
1 stop7h 42m
Portland
Sat 4/11
12:30 am-9:01 am
1 stop6h 31m
$249
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/17
6:05 pm-10:54 pm
1 stop6h 49m
Portland
Wed 4/22
7:00 am-4:08 pm
1 stop7h 08m
$275
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 3/3
6:25 am-1:44 pm
2 stops9h 19m
Portland
Tue 3/10
1:00 pm-8:41 pm
1 stop5h 41m
$279
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Tue 4/7
2:12 pm-8:59 pm
2 stops8h 47m
Portland
Mon 4/13
5:05 pm-12:25 am
1 stop5h 20m
$281
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Fri 4/24
6:45 pm-11:53 pm
1 stop7h 08m
Portland
Sat 5/2
5:30 am-4:50 pm
2 stops9h 20m
$281
Showing 1-10 of 22 results
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
Prices
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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 January 30, 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 $179). Flying from St. Louis to Portland in March is currently the most expensive (average of $249). 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 3, 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
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
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
Beaverton
Hillsboro
Troutdale
Cannon Beach
Long Beach
McMinnville
Tigard
The Dalles
Depoe Bay
Wilsonville
Stevenson
Tillamook
Pacific City
Gresham
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for St. Louis to Portland
See prices for flight routes from nearby airports that may be better suited for you.
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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$245 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$188 | Average$327 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$204 | Average$392 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$324 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$238 | Average$379 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$389 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$338 | Average$520 | FlexibilityNo cancel fee | On-time85% |