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St. Louis

$63+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Cheap 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 October 27, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$131
(Frontier)

One-way from

$63
(Trip.com)

Popular in

March

Cheapest in

January

Average price

$349
Provider with most accurate pricing for Portland-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Portland-Lambert-St Louis flights.
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From Oregon to Lambert-St Louis
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One-way flight from Oregon to Lambert-St Louis
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Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 27, 2025.

This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:44 pmBOI - STL
1 stop20h 30mFrontier
Wed 12/107:43 pmSTL - BOI
1 stop17h 06mFrontier
Deal found 10/27$131
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:55 pmPDX - STL
1 stop7h 03mUnited Airlines
Sun 12/75:30 pmSTL - PDX
1 stop9h 07mUnited Airlines
Deal found 10/26$249
This Southwest deal was found by Cheapflights users on 10/27. 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.
Thu 11/205:00 amPDX - STL
2 stops10h 20mSouthwest
Sun 11/236:40 pmSTL - PDX
1 stop7h 40mSouthwest
Deal found 10/27$254
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/73:26 pmPDX - STL
1 stop15h 41mFrontier
Fri 11/149:07 pmSTL - PDX
2 stops16h 49mFrontier
Deal found 10/25$257
This Delta deal was found by Cheapflights users on 10/26. 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.
Mon 11/175:05 pmPDX - STL
1 stop5h 41mDelta
Wed 11/192:36 pmSTL - PDX
2 stops11h 38mDelta
Deal found 10/26$262
This Booking.com deal was found by Cheapflights users on 10/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/33:26 pmPDX - STL
1 stop15h 41mFrontier
Thu 11/67:45 pmSTL - PDX
1 stop18h 11mFrontier
Deal found 10/26$265
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:44 pmBOI - STL
1 stop20h 30mFrontier
Fri 12/1210:44 pmSTL - BOI
2 stops38h 05mFrontier
Deal found 10/24$268
This Delta deal was found by Cheapflights users on 10/25. 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.
Tue 12/97:00 amEUG - STL
2 stops10h 10mDelta
Tue 12/166:00 amSTL - EUG
2 stops11h 49mDelta
Deal found 10/25$274
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:40 amPDX - STL
1 stop8h 25mSouthwest
Mon 12/227:05 pmSTL - PDX
1 stop8h 00mSouthwest
Deal found 10/24$274
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:47 pmPDX - STL
1 stop19h 15mFrontier
Sat 1/37:43 pmSTL - PDX
1 stop18h 00mFrontier
Deal found 10/26$275
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Wed 12/243:59 pmPDX - STL
2 stops22h 25mFrontier
Wed 12/317:43 pmSTL - PDX
1 stop18h 00mFrontier
Deal found 10/26$278
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Sun 12/2812:47 pmPDX - STL
1 stop19h 15mFrontier
Wed 12/317:43 pmSTL - PDX
1 stop18h 00mFrontier
Deal found 10/26$281

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 October 27, 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

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 12/4

12:44 pm-10:14 am

1 stop20h 30m

Lambert-St Louis

Wed 12/10

7:43 pm-11:49 am

1 stop17h 06m

$131

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 12/5

10:50 am-6:55 pm

1 stop6h 05m

Lambert-St Louis

Mon 12/8

1:50 pm-7:20 pm

1 stop7h 30m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 12/10

5:30 am-1:30 pm

1 stop6h 00m

Lambert-St Louis

Mon 12/15

2:38 pm-10:15 pm

1 stop9h 37m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 2/14

1:45 pm-11:56 pm

1 stop8h 11m

Lambert-St Louis

Sat 2/28

7:00 am-12:36 pm

1 stop7h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 2/18

1:45 pm-11:56 pm

1 stop8h 11m

Lambert-St Louis

Mon 2/23

7:00 am-12:36 pm

1 stop7h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 2/11

12:55 am-8:54 am

1 stop5h 59m

Lambert-St Louis

Mon 3/2

5:00 pm-11:54 pm

1 stop8h 54m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 2/19

1:45 pm-11:56 pm

1 stop8h 11m

Lambert-St Louis

Sun 2/22

7:00 am-12:36 pm

1 stop7h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 2/12

6:00 am-1:52 pm

1 stop5h 52m

Lambert-St Louis

Sun 3/1

7:00 am-12:36 pm

1 stop7h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 2/20

6:00 am-1:52 pm

1 stop5h 52m

Lambert-St Louis

Sun 2/22

7:00 am-12:36 pm

1 stop7h 36m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Mon 2/16

1:45 pm-11:56 pm

1 stop8h 11m

Lambert-St Louis

Fri 2/27

7:00 am-12:36 pm

1 stop7h 36m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

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, February is the cheapest month in which you can book a flight from Oregon to St. Louis (average of $147). Flying from Oregon to St. Louis in March is currently the most expensive (average of $306). 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 October 27, 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. Frontier 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 $75. However, be on the lookout for offers from Alaska Airlines and Delta, 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 Bend/Redmond - 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, February is the cheapest month in which you can book a flight from Oregon to St. Louis (average of $147). Flying from Oregon to St. Louis in March is currently the most expensive (average of $306). 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
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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$124Average$262FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$441FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$425FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$226Average$510FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$247Average$419FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$262Average$452FlexibilityNo cancel feeOn-time75%

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