$123+ Cheap flights from Portland to St. Louis (PDX - STL)
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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
juil. 31 — août 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Portland to St. Louis 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 Portland to Lambert-St Louis are usually found in November or May, booked 73 days in advance, depart on a Friday or Monday and return on a Tuesday
Cheap flight deals from Portland to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to St. LouisExplore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juillet 1, 2026.
Explore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juillet 1, 2026.
This Frontier deal was found by Cheapflights users on 6/28. 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.
ven. 9/119:34 pm
PDX
- STL
1 stop12h 17m
Frontier
dim. 9/1312:46 pm
STL
- PDX
1 stop9h 53m
Frontier
Deal found 6/28![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 6/28. 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.
jeu. 7/306:49 pm
PDX
- STL
1 stop21h 26m
Frontier
ven. 8/78:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/28![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 6/25. 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.
ven. 7/105:49 pm
PDX
- STL
1 stop22h 26m
Frontier
ven. 7/178:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/25![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 6/28. 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.
mar. 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
jeu. 7/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/28![Frontier logo]()
$268
This CheapOair deal was found by Cheapflights users on 6/30. 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.
mer. 8/55:21 pm
PDX
- STL
1 stop24h 02m
Frontier
mar. 8/118:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Deal found 6/30![Frontier logo]()
$275
This CheapOair deal was found by Cheapflights users on 6/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/59:34 pm
PDX
- STL
1 stop12h 17m
Frontier
jeu. 10/85:19 pm
STL
- PDX
1 stop29h 20m
Frontier
Deal found 6/26![Frontier logo]()
$286
This CheapOair deal was found by Cheapflights users on 6/28. 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.
ven. 7/315:49 pm
PDX
- STL
1 stop22h 26m
Frontier
lun. 8/38:08 pm
STL
- PDX
1 stop22h 23m
Frontier
Deal found 6/28![Frontier logo]()
$289
This Expedia deal was found by Cheapflights users on 6/29. 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.
ven. 9/189:34 pm
PDX
- STL
1 stop12h 17m
Multiple Airlines
sam. 9/266:08 pm
STL
- PDX
Nonstop4h 12m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
mar. 8/45:16 pm
PDX
- STL
2 stops13h 41m
Frontier
mer. 8/127:03 pm
STL
- PDX
1 stop25h 01m
Frontier
Deal found 6/30![Frontier logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
mar. 8/45:16 pm
PDX
- STL
1 stop24h 07m
Frontier
dim. 8/97:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/30![Frontier logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
mar. 8/45:16 pm
PDX
- STL
1 stop24h 07m
Frontier
jeu. 8/138:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/30![Frontier logo]()
$305
Best flights from Portland to St. LouisDiscover carefully curated flight deals from Portland to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated juillet 1, 2026.
Discover carefully curated flight deals from Portland to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated juillet 1, 2026.
This Delta deal was found by Cheapflights users on 6/30. 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.
ven. 11/610:50 pm
PDX
- STL
1 stop10h 01m
Delta
lun. 11/97:55 pm
STL
- PDX
1 stop5h 56m
Delta
Deal found 6/30![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/29. 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.
mar. 10/1310:43 am
PDX
- STL
1 stop8h 38m
United Airlines
mer. 2/104:30 pm
STL
- PDX
1 stop6h 19m
United Airlines
Deal found 6/29![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 6/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 8/1511:30 pm
PDX
- STL
1 stop7h 45m
Southwest
dim. 8/237:30 pm
STL
- PDX
1 stop6h 00m
Southwest
Deal found 6/26![Southwest logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 6/28. 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.
mar. 9/296:20 am
PDX
- STL
1 stop6h 01m
Alaska Airlines
mer. 9/306:08 pm
STL
- PDX
Nonstop4h 12m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 6/25. 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.
ven. 9/43:00 pm
PDX
- STL
1 stop6h 26m
Delta
lun. 9/73:39 pm
STL
- PDX
1 stop8h 11m
Delta
Deal found 6/25![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 6/27. 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.
mer. 8/125:50 am
PDX
- STL
1 stop7h 15m
Southwest
mer. 8/195:35 am
STL
- PDX
2 stops11h 50m
Southwest
Deal found 6/27![Southwest logo]()
$330
This Delta deal was found by Cheapflights users on 6/30. 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.
mer. 8/512:35 am
PDX
- STL
1 stop6h 02m
Delta
ven. 8/142:32 pm
STL
- PDX
1 stop5h 33m
Delta
Deal found 6/30![Delta logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 6/28. 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.
mer. 8/1210:49 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
mer. 8/127:56 pm
STL
- PDX
1 stop6h 26m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 6/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/129:45 pm
PDX
- STL
1 stop8h 27m
Delta
lun. 10/197:55 pm
STL
- PDX
1 stop5h 56m
Delta
Deal found 6/26![Delta logo]()
$319
This Delta deal was found by Cheapflights users on 6/29. 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.
ven. 10/232:20 pm
PDX
- STL
1 stop7h 28m
Delta
mer. 10/286:30 am
STL
- PDX
1 stop6h 04m
Delta
Deal found 6/29![Delta logo]()
$319
Last-minute flights from Portland to St. LouisDiscover last-minute flight deals from Portland to St. Louis. Data last updated juillet 1, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to St. Louis. Data last updated juillet 1, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/25. 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.
ven. 7/105:49 pm
PDX
- STL
1 stop22h 26m
Frontier
ven. 7/178:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/25![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 6/28. 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.
mar. 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
jeu. 7/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/28![Frontier logo]()
$268
This CheapOair deal was found by Cheapflights users on 6/27. 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.
mar. 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
sam. 7/188:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/27![Frontier logo]()
$323
This CheapOair deal was found by Cheapflights users on 6/28. 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.
lun. 7/205:49 pm
PDX
- STL
1 stop22h 16m
Frontier
sam. 7/258:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/28![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 6/27. 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.
lun. 7/275:49 pm
PDX
- STL
1 stop22h 16m
Multiple Airlines
sam. 8/14:57 pm
STL
- PDX
2 stops23h 01m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$316
This American Airlines deal was found by Cheapflights users on 6/29. 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.
lun. 7/2711:15 pm
PDX
- STL
1 stop7h 16m
American Airlines
ven. 7/317:22 pm
STL
- PDX
1 stop7h 33m
American Airlines
Deal found 6/29![American Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
mer. 7/295:21 pm
PDX
- STL
1 stop24h 02m
Frontier
dim. 8/26:34 pm
STL
- PDX
2 stops24h 17m
Frontier
Deal found 6/29![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
mer. 7/295:21 pm
PDX
- STL
1 stop24h 02m
Multiple Airlines
dim. 8/25:37 pm
STL
- PDX
Nonstop4h 10m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$331
This CheapOair deal was found by Cheapflights users on 6/28. 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.
jeu. 7/306:49 pm
PDX
- STL
1 stop21h 26m
Frontier
ven. 8/78:08 pm
STL
- PDX
1 stop22h 43m
Frontier
Deal found 6/28![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 6/25. 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.
jeu. 7/306:49 pm
PDX
- STL
1 stop21h 26m
Frontier
mar. 8/48:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Deal found 6/25![Frontier logo]()
$315
This CheapOair deal was found by Cheapflights users on 6/28. 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.
ven. 7/315:49 pm
PDX
- STL
1 stop22h 26m
Frontier
lun. 8/38:08 pm
STL
- PDX
1 stop22h 23m
Frontier
Deal found 6/28![Frontier logo]()
$289
One-way flights from Portland to St. LouisSearch for one-way flight options from Portland to St. Louis. Find affordable one-way fares based on user searches. Data last updated juillet 1, 2026.
Search for one-way flight options from Portland to St. Louis. Find affordable one-way fares based on user searches. Data last updated juillet 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
ven. 10/1612:34 pm
PDX
- STL
1 stop28h 41m
Frontier
Deal found 6/26![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 6/28. 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.
ven. 9/259:34 pm
PDX
- STL
1 stop12h 17m
Frontier
Deal found 6/28![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
lun. 8/246:17 pm
PDX
- STL
1 stop21h 33m
Frontier
Deal found 6/29![Frontier logo]()
$128
This Trip.com deal was found by Cheapflights users on 6/28. 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.
ven. 7/245:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Deal found 6/28![Frontier logo]()
$129
This CheapOair deal was found by Cheapflights users on 6/28. 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.
ven. 7/315:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Deal found 6/28![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
sam. 9/263:22 pm
PDX
- STL
1 stop25h 53m
Frontier
Deal found 6/30![Frontier logo]()
$135
This Trip.com deal was found by Cheapflights users on 6/28. 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.
ven. 7/175:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Deal found 6/28![Frontier logo]()
$138
This Trip.com deal was found by Cheapflights users on 6/27. 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.
mar. 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
Deal found 6/27![Frontier logo]()
$139
This Southwest deal was found by Cheapflights users on 6/28. 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.
sam. 9/269:45 am
PDX
- STL
Nonstop3h 45m
Southwest
Deal found 6/28![Southwest logo]()
$150
This Delta deal was found by Cheapflights users on 6/30. 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.
jeu. 12/2411:40 am
PDX
- STL
1 stop9h 59m
Delta
Deal found 6/30![Delta logo]()
$160
Find flight deals from Portland to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to St. Louis (STL). 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 juillet 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Frontier) |
One-way from | $123 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $428 |
Good round-trip deal | $377 or less |
Good one-way deal | $244 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to St. Louis 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 juillet 1, 2026.
Use the filters below to find and compare flights from Portland to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
ven. 11/6
10:50 pm-10:51 am
1 stop10h 01m
Lambert-St Louis
lun. 11/9
7:55 pm-11:51 pm
1 stop5h 56m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
mar. 10/13
10:43 am-9:21 pm
1 stop8h 38m
Lambert-St Louis
mer. 2/10
4:30 pm-8:49 pm
1 stop6h 19m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
sam. 8/15
11:30 pm-9:15 am
1 stop7h 45m
Lambert-St Louis
dim. 8/23
7:30 pm-11:30 pm
1 stop6h 00m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
ven. 9/4
3:00 pm-11:26 pm
1 stop6h 26m
Lambert-St Louis
lun. 9/7
3:39 pm-9:50 pm
1 stop8h 11m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
mer. 8/5
12:35 am-8:37 am
1 stop6h 02m
Lambert-St Louis
ven. 8/14
2:32 pm-6:05 pm
1 stop5h 33m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
lun. 10/12
9:45 pm-8:12 am
1 stop8h 27m
Lambert-St Louis
lun. 10/19
7:55 pm-11:51 pm
1 stop5h 56m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
ven. 10/23
2:20 pm-11:48 pm
1 stop7h 28m
Lambert-St Louis
mer. 10/28
6:30 am-10:34 am
1 stop6h 04m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
mer. 8/12
5:50 am-3:05 pm
1 stop7h 15m
Lambert-St Louis
mer. 8/19
5:35 am-3:25 pm
2 stops11h 50m
$330
Quickest round-trip
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
mar. 9/29
6:20 am-2:21 pm
1 stop6h 01m
Lambert-St Louis
mer. 9/30
6:08 pm-8:20 pm
Nonstop4h 12m
$367
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
mer. 8/12
10:49 am-4:37 pm
Nonstop3h 48m
Lambert-St Louis
mer. 8/12
7:56 pm-12:22 am
1 stop6h 26m
$381
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Portland to St. Louis
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 Portland to St. Louis in July.
| 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 Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Portland-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-St. Louis 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 Portland-St. Louis 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 Portland to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portland with our price prediction graph.
PDX-STL
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 Portland to St. Louis
How far ahead should I book a flight from Portland to St. Louis?
The best time to book flights from Portland to St. Louis is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Portland to St. Louis?
Currently, November is the cheapest month in which you can book a flight from Portland to St. Louis (average of $302). Flying from Portland to St. Louis in July is currently the most expensive (average of $428). 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 PDX to STL?
Find hourly flight availability from Portland to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated juillet 1, 2026.
When flying from Portland to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated juillet 1, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta from Portland to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Related info for your journey
Find useful and relevant information for your journey from Portland to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Portland
Popular flights
St. Louis flight routes
Alternative routes for Portland to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to St. Louis by cabin class
Find flights from Portland to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and St. Louis flights
Browse other Portland and St. Louis flight options. Last updated on juillet 1, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on juillet 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on juillet 1, 2026.
Top 6 airlines flying from Portland to St. Louis
Discover the top 6 airlines that operate flights from Portland to St. Louis. 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 juillet 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$75 | Average$287 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$176 | Average$344 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$386 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$208 | Average$386 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$416 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$385 | FlexibilityNo cancel fee | On-time69% |