$114+ Cheap flights from Oregon to St. Louis (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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
Aug 3 — Aug 101
Round-trip
1 adult, Economy
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Find cheap flights from Oregon 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.Cheap flight deals from Oregon to St. Louis
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Cheapest flights from Oregon to St. LouisExplore the most affordable flight options available from Oregon to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 4, 2026.
Explore the most affordable flight options available from Oregon to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 4, 2026.
This Frontier deal was found by Cheapflights users on 7/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:34 pm
PDX
- STL
1 stop12h 17m
Frontier
Sun 9/1312:46 pm
STL
- PDX
1 stop9h 53m
Frontier
Deal found 7/1![Frontier logo]()
$240
This Mytrip deal was found by Cheapflights users on 7/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:34 pm
PDX
- STL
1 stop12h 17m
Frontier
Thu 10/85:19 pm
STL
- PDX
1 stop29h 20m
Frontier
Deal found 7/3![Frontier logo]()
$249
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.
Thu 8/201:47 pm
PDX
- STL
1 stop26h 03m
Frontier
Sun 8/236:45 pm
STL
- PDX
1 stop24h 36m
Frontier
Deal found 6/30![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Thu 8/2012:24 pm
BOI
- STL
1 stop5h 49m
Frontier
Mon 8/247:58 pm
STL
- BOI
1 stop17h 31m
Frontier
Deal found 7/2![Frontier logo]()
$254
This CheapOair deal was found by Cheapflights users on 7/1. 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.
Thu 8/131:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Mon 8/178:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 7/1![Frontier logo]()
$266
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.
Tue 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
Thu 7/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/30![Frontier logo]()
$268
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Mon 9/143:52 pm
BOI
- STL
1 stop18h 59m
Frontier
Wed 9/1612:46 pm
STL
- BOI
1 stop27h 11m
Frontier
Deal found 7/2![Frontier logo]()
$269
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.
Wed 8/55:21 pm
PDX
- STL
1 stop24h 02m
Frontier
Tue 8/118:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Deal found 6/30![Frontier logo]()
$275
This Frontier deal was found by Cheapflights users on 7/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:34 pm
PDX
- STL
1 stop12h 17m
Frontier
Mon 9/1412:46 pm
STL
- PDX
1 stop9h 53m
Frontier
Deal found 7/1![Frontier logo]()
$276
This Expedia deal was found by Cheapflights users on 7/1. 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.
Fri 9/189:34 pm
PDX
- STL
1 stop12h 17m
Multiple Airlines
Tue 9/226:08 pm
STL
- PDX
Nonstop4h 12m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$279
This Booking.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:56 pm
PDX
- STL
1 stop23h 17m
Multiple Airlines
Wed 9/96:08 pm
STL
- PDX
Nonstop4h 12m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$282
This Gotogate deal was found by Cheapflights users on 7/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:49 pm
PDX
- STL
1 stop21h 26m
Frontier
Sun 8/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 7/2![Frontier logo]()
$284
Best flights from Oregon to St. LouisDiscover carefully curated flight deals from Oregon to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 4, 2026.
Discover carefully curated flight deals from Oregon to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 4, 2026.
This CheapOair deal was found by Cheapflights users on 7/3. 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.
Fri 9/113:52 pm
BOI
- STL
1 stop18h 59m
Frontier
Sun 9/2012:46 pm
STL
- BOI
1 stop27h 11m
Frontier
Deal found 7/3![Frontier logo]()
$254
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/113:25 pm
PDX
- STL
1 stop6h 25m
Southwest
Sun 9/139:55 pm
STL
- PDX
Nonstop4h 10m
Southwest
Deal found 6/30![Southwest logo]()
$309
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.
Wed 8/512:35 am
PDX
- STL
1 stop6h 02m
Delta
Mon 8/1011:13 am
STL
- PDX
1 stop8h 21m
Delta
Deal found 6/30![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:50 am
PDX
- STL
2 stops9h 10m
United Airlines
Wed 11/44:40 pm
STL
- PDX
1 stop6h 28m
United Airlines
Deal found 7/3![United Airlines logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:20 am
PDX
- STL
1 stop6h 01m
Alaska Airlines
Wed 9/306:08 pm
STL
- PDX
Nonstop4h 12m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$347
This CheapOair deal was found by Cheapflights users on 7/3. 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 8/2012:24 pm
BOI
- STL
1 stop5h 49m
Frontier
Mon 8/247:58 pm
STL
- BOI
1 stop17h 31m
Frontier
Deal found 7/3![Frontier logo]()
$254
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.
Fri 8/712:35 am
PDX
- STL
1 stop7h 48m
Delta
Mon 8/178:00 am
STL
- PDX
1 stop6h 10m
Delta
Deal found 6/29![Delta logo]()
$319
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.
Tue 8/2512:35 am
PDX
- STL
1 stop6h 02m
Delta
Mon 9/711:00 am
STL
- PDX
1 stop9h 55m
Delta
Deal found 6/30![Delta logo]()
$319
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am
EUG
- STL
2 stops6h 30m
Southwest
Tue 9/87:00 am
STL
- EUG
1 stop5h 35m
Southwest
Deal found 6/29![Southwest logo]()
$354
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:00 am
BOI
- STL
1 stop10h 10m
Alaska Airlines
Tue 9/156:29 am
STL
- BOI
1 stop7h 06m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$363
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.
Fri 9/113:52 pm
BOI
- STL
1 stop18h 59m
Frontier
Mon 9/1412:46 pm
STL
- BOI
2 stops24h 18m
Frontier
Deal found 6/30![Frontier logo]()
$352
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:25 pm
BOI
- STL
1 stop6h 10m
Southwest
Tue 9/14:05 pm
STL
- BOI
1 stop8h 05m
Southwest
Deal found 6/29![Southwest logo]()
$363
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1310:49 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Sun 8/165:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:40 am
PDX
- STL
2 stops10h 41m
United Airlines
Wed 9/304:39 pm
STL
- PDX
1 stop6h 31m
United Airlines
Deal found 7/3![United Airlines logo]()
$422
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.
Tue 7/284:43 pm
EUG
- STL
1 stop5h 58m
Delta
Tue 8/42:32 pm
STL
- EUG
2 stops11h 27m
Delta
Deal found 6/30![Delta logo]()
$354
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Wed 10/146:40 am
BOI
- STL
1 stop8h 04m
Alaska Airlines
Sun 10/187:00 am
STL
- BOI
1 stop9h 23m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:15 am
PDX
- STL
1 stop8h 05m
Southwest
Mon 9/76:05 am
STL
- PDX
2 stops10h 55m
Southwest
Deal found 7/2![Southwest logo]()
$394
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.
Sat 9/56:10 am
EUG
- STL
2 stops12h 50m
Delta
Tue 9/85:00 pm
STL
- EUG
2 stops8h 59m
Delta
Deal found 6/29![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 7/2. 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 7/3012:50 pm
EUG
- STL
1 stop6h 36m
United Airlines
Thu 8/65:10 am
STL
- EUG
2 stops8h 51m
United Airlines
Deal found 7/2![United Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:05 am
PDX
- STL
2 stops8h 50m
Southwest
Wed 11/41:50 pm
STL
- PDX
2 stops9h 30m
Southwest
Deal found 7/3![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 7/1. 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.
Thu 8/64:43 pm
EUG
- STL
1 stop5h 58m
Delta
Mon 8/107:45 pm
STL
- EUG
1 stop6h 01m
Delta
Deal found 7/1![Delta logo]()
$361
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.
Sun 11/112:45 pm
MFR
- STL
1 stop5h 49m
United Airlines
Sat 11/74:40 pm
STL
- MFR
1 stop6h 42m
United Airlines
Deal found 6/29![United Airlines logo]()
$442
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:23 am
BOI
- STL
1 stop6h 43m
Alaska Airlines
Wed 8/266:35 am
STL
- BOI
1 stop8h 47m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$413
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:25 am
EUG
- STL
2 stops10h 50m
Southwest
Tue 8/42:45 pm
STL
- EUG
2 stops9h 45m
Southwest
Deal found 6/30![Southwest logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 8/510:49 am
PDX
- STL
Nonstop3h 48m
Alaska Airlines
Mon 8/105:37 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$417
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.
Mon 8/241:00 pm
MFR
- STL
1 stop5h 46m
United Airlines
Fri 8/281:36 pm
STL
- MFR
2 stops11h 09m
United Airlines
Deal found 6/29![United Airlines logo]()
$464
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.
Tue 8/44:43 pm
EUG
- STL
2 stops15h 40m
Delta
Mon 8/102:32 pm
STL
- EUG
2 stops11h 27m
Delta
Deal found 6/30![Delta logo]()
$415
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:45 pm
BOI
- STL
2 stops9h 40m
Southwest
Mon 10/266:20 pm
STL
- BOI
1 stop7h 40m
Southwest
Deal found 7/3![Southwest logo]()
$418
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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 10/315:59 am
MFR
- STL
1 stop7h 45m
Alaska Airlines
Wed 11/47:00 am
STL
- MFR
1 stop9h 36m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 7/2. 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 7/171:49 pm
RDM
- STL
2 stops8h 08m
United Airlines
Tue 7/211:13 pm
STL
- RDM
2 stops11h 46m
United Airlines
Deal found 7/2![United Airlines logo]()
$485
Last-minute flights from Oregon to St. LouisDiscover last-minute flight deals from Oregon to St. Louis. Data last updated July 4, 2026 and is based on user searches.
Discover last-minute flight deals from Oregon to St. Louis. Data last updated July 4, 2026 and is based on user searches.
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.
Tue 7/145:16 pm
PDX
- STL
1 stop24h 07m
Frontier
Thu 7/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/30![Frontier logo]()
$268
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Sat 7/258:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/29![Frontier logo]()
$286
This iWofly deal was found by Cheapflights users on 7/1. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Mon 7/278:08 pm
STL
- PDX
1 stop22h 23m
Frontier
Deal found 7/1![Frontier 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.
Tue 8/45:16 pm
PDX
- STL
1 stop24h 07m
Frontier
Wed 8/127:03 pm
STL
- PDX
1 stop25h 01m
Frontier
Deal found 6/30![Frontier logo]()
$298
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.
Wed 8/55:21 pm
PDX
- STL
1 stop24h 02m
Frontier
Tue 8/118:08 pm
STL
- PDX
1 stop22h 28m
Frontier
Deal found 6/30![Frontier logo]()
$275
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.
Wed 8/55:21 pm
PDX
- STL
2 stops22h 16m
Frontier
Wed 8/127:03 pm
STL
- PDX
1 stop25h 01m
Frontier
Deal found 6/30![Frontier logo]()
$291
This Gotogate deal was found by Cheapflights users on 7/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:49 pm
PDX
- STL
1 stop21h 26m
Frontier
Sun 8/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 7/2![Frontier logo]()
$284
This CheapOair deal was found by Cheapflights users on 7/1. 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.
Thu 8/131:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Mon 8/178:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 7/1![Frontier logo]()
$266
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.
Thu 8/136:49 pm
PDX
- STL
1 stop21h 26m
Frontier
Sun 8/167:10 pm
STL
- PDX
1 stop23h 44m
Frontier
Deal found 6/30![Frontier logo]()
$289
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.
Thu 8/201:47 pm
PDX
- STL
1 stop26h 03m
Frontier
Sun 8/236:45 pm
STL
- PDX
1 stop24h 36m
Frontier
Deal found 6/30![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Thu 8/2012:24 pm
BOI
- STL
1 stop5h 49m
Frontier
Mon 8/247:58 pm
STL
- BOI
1 stop17h 31m
Frontier
Deal found 7/2![Frontier logo]()
$254
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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.
Tue 8/2511:16 am
PDX
- STL
Nonstop3h 54m
Alaska Airlines
Tue 9/86:08 pm
STL
- PDX
Nonstop4h 12m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$297
One-way flights from Oregon to St. LouisSearch for one-way flight options from Oregon to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
Search for one-way flight options from Oregon to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 8/2410:23 am
MFR
- STL
1 stop29h 27m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$114
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.
Tue 7/211:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Deal found 6/29![Frontier logo]()
$122
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:34 pm
PDX
- STL
1 stop12h 17m
Frontier
Deal found 6/30![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 8/316:17 pm
PDX
- STL
1 stop21h 33m
Frontier
Deal found 7/2![Frontier logo]()
$127
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.
Mon 8/246:17 pm
PDX
- STL
1 stop21h 33m
Frontier
Deal found 6/29![Frontier logo]()
$128
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.
Fri 7/245:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Deal found 6/30![Frontier logo]()
$129
This Trip.com deal was found by Cheapflights users on 7/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:21 pm
PDX
- STL
1 stop24h 02m
Frontier
Deal found 7/1![Frontier logo]()
$130
This CheapOair deal was found by Cheapflights users on 7/1. 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 7/315:49 pm
PDX
- STL
1 stop22h 26m
Frontier
Deal found 7/1![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Thu 7/306:49 pm
PDX
- STL
1 stop21h 26m
Frontier
Deal found 7/1![Frontier logo]()
$134
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.
Sat 9/263:22 pm
PDX
- STL
1 stop25h 53m
Frontier
Deal found 6/30![Frontier logo]()
$135
This CheapOair deal was found by Cheapflights users on 7/1. 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.
Wed 7/155:21 pm
PDX
- STL
1 stop24h 02m
Frontier
Deal found 7/1![Frontier logo]()
$140
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:24 pm
BOI
- STL
1 stop5h 49m
Frontier
Deal found 7/2![Frontier logo]()
$147
Find flight deals from Oregon to St. Louis
Keep the following information in mind while searching for Oregon to St. Louis flight deals. Data was last updated July 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Frontier) |
One-way from | $114 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $428 |
Good round-trip deal | $377 or less |
Good one-way deal | $261 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Oregon 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 July 4, 2026.
Use the filters below to find and compare flights from Oregon to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Fri 9/11
3:52 pm-11:51 am
1 stop18h 59m
Lambert-St Louis
Sun 9/20
12:46 pm-2:57 pm
1 stop27h 11m
$254
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Thu 8/20
12:24 pm-7:13 pm
1 stop5h 49m
Lambert-St Louis
Mon 8/24
7:58 pm-12:29 pm
1 stop17h 31m
$254
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Fri 9/11
3:25 pm-11:50 pm
1 stop6h 25m
Lambert-St Louis
Sun 9/13
9:55 pm-12:05 am
Nonstop4h 10m
$309
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Wed 8/5
12:35 am-8:37 am
1 stop6h 02m
Lambert-St Louis
Mon 8/10
11:13 am-5:34 pm
1 stop8h 21m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Fri 8/7
12:35 am-10:23 am
1 stop7h 48m
Lambert-St Louis
Mon 8/17
8:00 am-12:10 pm
1 stop6h 10m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Tue 8/25
12:35 am-8:37 am
1 stop6h 02m
Lambert-St Louis
Mon 9/7
11:00 am-6:55 pm
1 stop9h 55m
$319
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Tue 9/1
10:50 am-10:00 pm
2 stops9h 10m
Lambert-St Louis
Wed 11/4
4:40 pm-9:08 pm
1 stop6h 28m
$322
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Tue 9/29
6:20 am-2:21 pm
1 stop6h 01m
Lambert-St Louis
Wed 9/30
6:08 pm-8:20 pm
Nonstop4h 12m
$347
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Fri 9/11
3:52 pm-11:51 am
1 stop18h 59m
Lambert-St Louis
Mon 9/14
12:46 pm-12:04 pm
2 stops24h 18m
$352
EugeneSt. Louis
EUG - STL
EUGSTL
Eugene
Sat 9/5
7:00 am-3:30 pm
2 stops6h 30m
Lambert-St Louis
Tue 9/8
7:00 am-10:35 am
1 stop5h 35m
$354
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Oregon to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Oregon with our price prediction graph.
MFR-STL
BOI-STL
PDX-STL
RDM-STL
EUG-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 Oregon to St. Louis
USOR-STL
MFR-STL
BOI-STL
PDX-STL
RDM-STL
What is the cheapest month to book a flight from Oregon to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Oregon to St. Louis (average of $75). Flying from Oregon to St. Louis in July is currently the most expensive (average of $210). 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 OR to STL?
Find hourly flight availability from Oregon 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 July 4, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oregon to St. Louis as you normally would.
Weekly flight availability from Oregon to St. Louis
Explore weekly flight availability from Oregon to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 4, 2026.
The most flights from USOR to STL are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Oregon to St. Louis?
How far ahead should I book a flight from Oregon to St. Louis?
The best time to book flights from Oregon 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.
Related info for your journey
Find useful and relevant information for your journey from Oregon 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
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Alternative routes for Oregon to St. Louis
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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 Oregon to St. Louis by cabin class
Find flights from Oregon to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Oregon and St. Louis flights
Browse other Oregon and St. Louis flight options. Last updated on July 4, 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 July 4, 2026.
Oregon to St. Louis flights
Consider these flights traveling from Oregon to St. Louis.
Top 6 airlines flying from Oregon to St. Louis
Discover the top 6 airlines that operate flights from Oregon 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 July 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$75 | Average$287 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$176 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$462 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$224 | Average$488 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$228 | Average$377 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$432 | FlexibilityNo cancel fee | On-time63% |