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St. Louis

$68+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Oregon to St. Louis

Cheapest flights from Oregon to St. Louis
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 December 18, 2025.

This Delta deal was found by Cheapflights users on 12/15. 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 12/312:11 pmPDX - STL
1 stop6h 05mDelta
Mon 1/57:00 amSTL - PDX
1 stop7h 32mDelta
Deal found 12/15$249
This Delta deal was found by Cheapflights users on 12/15. 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 12/295:30 amPDX - STL
1 stop5h 53mDelta
Mon 1/57:00 amSTL - PDX
1 stop7h 32mDelta
Deal found 12/15$333
This Delta deal was found by Cheapflights users on 12/15. 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 12/3012:16 pmPDX - STL
1 stop8h 00mDelta
Mon 1/57:00 amSTL - PDX
1 stop7h 32mDelta
Deal found 12/15$384
This Delta deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:30 amPDX - STL
1 stop5h 53mDelta
Mon 1/57:00 amSTL - PDX
1 stop7h 32mDelta
Deal found 12/15$399
This Southwest deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:45 amBOI - STL
1 stop5h 45mSouthwest
Sat 1/37:30 pmSTL - BOI
1 stop7h 10mSouthwest
Deal found 12/16$401
This Delta deal was found by Cheapflights users on 12/17. 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 12/242:11 pmPDX - STL
1 stop6h 05mDelta
Thu 1/17:20 amSTL - PDX
1 stop7h 19mDelta
Deal found 12/17$404
This Delta deal was found by Cheapflights users on 12/16. 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 12/1712:32 amPDX - STL
1 stop6h 38mDelta
Thu 12/257:20 amSTL - PDX
1 stop7h 19mDelta
Deal found 12/16$421
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/312:45 pmPDX - STL
1 stop5h 37mUnited Airlines
Thu 1/16:00 amSTL - PDX
1 stop9h 20mUnited Airlines
Deal found 12/15$423
This Delta deal was found by Cheapflights users on 12/15. 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 12/312:11 pmPDX - STL
1 stop6h 05mDelta
Sun 1/46:05 amSTL - PDX
1 stop7h 00mDelta
Deal found 12/15$454
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/232:29 pmPDX - STL
1 stop23h 55mFrontier
Tue 1/65:11 pmSTL - PDX
2 stops44h 04mFrontier
Deal found 12/16$482
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/188:56 pmEUG - STL
2 stops11h 06mMultiple Airlines
Fri 12/198:42 pmSTL - EUG
1 stop15h 35mMultiple Airlines
Deal found 12/16$610
This Southwest deal was found by Cheapflights users on 12/16. 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 12/271:55 pmBOI - STL
1 stop7h 15mSouthwest
Sun 1/47:05 pmSTL - BOI
1 stop7h 20mSouthwest
Deal found 12/16$677

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$209
(Kiwi.com)

One-way from

$68
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$456
Provider with most accurate pricing for Portland-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Lambert-St Louis flights.
Search Deals
From Oregon to Lambert-St Louis
Search Deals
One-way flight from Oregon to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 2025.
Use the filters below to find and compare flights from Oregon to St. Louis that are best for you.

Fly from

Oregon

Fly to

St. Louis

Route

Depart

Return

Price

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 2/7

1:53 pm-11:25 pm

1 stop7h 32m

Lambert-St Louis

Tue 2/10

6:10 am-12:46 pm

1 stop8h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 1/14

5:00 am-1:16 pm

1 stop6h 16m

Lambert-St Louis

Tue 1/27

1:15 pm-6:56 pm

1 stop7h 41m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 1/8

1:39 pm-9:35 pm

1 stop5h 56m

Lambert-St Louis

Sun 1/11

6:10 am-12:46 pm

1 stop8h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 1/30

8:30 am-4:55 pm

1 stop6h 25m

Lambert-St Louis

Mon 2/2

4:49 pm-10:32 pm

1 stop7h 43m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 1/1

12:16 pm-10:16 pm

1 stop8h 00m

Lambert-St Louis

Mon 1/5

7:00 am-12:32 pm

1 stop7h 32m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 3/4

6:00 am-2:56 pm

1 stop6h 56m

Lambert-St Louis

Mon 3/9

3:25 pm-9:11 pm

1 stop7h 46m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 2/6

12:40 am-10:43 am

1 stop8h 03m

Lambert-St Louis

Wed 2/11

3:31 pm-8:32 pm

1 stop7h 01m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 2/7

5:30 am-9:38 pm

2 stops14h 08m

Lambert-St Louis

Sat 2/14

6:10 am-12:44 pm

1 stop8h 34m

$252

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Mon 2/9

6:00 am-2:38 pm

1 stop6h 38m

Lambert-St Louis

Sat 2/14

7:00 am-10:48 pm

2 stops17h 48m

$252

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 2/7

7:10 am-9:38 pm

2 stops12h 28m

Lambert-St Louis

Fri 2/13

6:40 pm-11:53 pm

1 stop7h 13m

$252

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 results
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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.
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

What is the cheapest month to book a flight from Oregon to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Oregon to St. Louis (average of $178). Flying from Oregon to St. Louis in March is currently the most expensive (average of $313). 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 December 18, 2025.

It’s optimal to fly from Oregon to St. Louis in the evening. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Oregon to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Oregon to St. Louis. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Oregon to St. Louis flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

  • What airport do you fly into for flights to St. Louis from Oregon?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Oregon.

  • How long is the flight from Oregon to St. Louis?

    A quick flight from Oregon to St. Louis can take about 6h 16m. Delta provides one of the quickest options available for as low as $249. Airlines will cover a distance of 1702 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Oregon to St. Louis one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $86. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from Oregon to St. Louis for a low price.

  • What are the most popular routes from Oregon to St. Louis?

    While some choose either Boise Air Term. Gowen Fld - Lambert-St Louis or Eugene - Lambert-St Louis, Portland - Lambert-St Louis is the most popular route from Oregon to St. Louis.

  • Can I find deals for flights from Oregon to St. Louis that include hotel bookings?

    Yes. In addition to deals on Oregon to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oregon to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oregon to St. Louis.

  • Can I find deals for business class flights from Oregon to St. Louis?

    Yes. Cheapflights offers flight deals from Oregon to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Oregon to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Oregon to St. Louis (average of $178). Flying from Oregon to St. Louis in March is currently the most expensive (average of $313). 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$158Average$266FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$414FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$432FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$226Average$499FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$246Average$420FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$265Average$456FlexibilityNo cancel feeOn-time75%

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