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St. Louis

$109+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$232
(Delta)

One-way from

$109
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$479

Good one-way deal

$209 or less
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 ($23 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 March 2025
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Price to beat on a one-way flight from Oregon to Lambert-St Louis.
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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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/26. 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 7/2311:59 pmPDX - STL
1 stop7h 32mUnited Airlines
Mon 7/285:00 amSTL - PDX
1 stop6h 42mUnited Airlines
Deal found 3/26$227
This Delta deal was found by Cheapflights users on 3/25. 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.
Wed 5/145:00 pmPDX - STL
1 stop5h 33mDelta
Wed 5/286:05 pmSTL - PDX
1 stop7h 20mDelta
Deal found 3/25$232
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2211:59 pmPDX - STL
1 stop8h 27mAmerican Airlines
Tue 5/66:00 amSTL - PDX
1 stop6h 24mAmerican Airlines
Deal found 3/26$234
This CheapOair deal was found by Cheapflights users on 3/27. 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.
Thu 5/16:20 amPDX - STL
1 stop6h 47mFrontier
Sun 5/49:55 pmSTL - PDX
1 stop19h 47mFrontier
Deal found 3/27$248
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:40 pmBOI - STL
1 stop6h 19mDelta
Fri 5/166:05 pmSTL - BOI
1 stop7h 17mDelta
Deal found 3/27$282
This Expedia deal was found by Cheapflights users on 3/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/181:25 pmPDX - STL
1 stop8h 39mMultiple Airlines
Sat 5/247:24 pmSTL - PDX
1 stop6h 53mMultiple Airlines
Deal found 3/26$288
This Hawaiian Airlines deal was found by Cheapflights users on 3/27. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/234:20 pmBOI - STL
1 stop6h 39mHawaiian Airlines
Wed 4/306:30 amSTL - BOI
1 stop6h 46mHawaiian Airlines
Deal found 3/27$291
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/242:50 pmPDX - STL
1 stop7h 00mSouthwest
Mon 6/26:55 pmSTL - PDX
1 stop6h 35mSouthwest
Deal found 3/25$298
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/185:55 amEUG - STL
1 stop5h 33mDelta
Sat 4/1910:30 amSTL - EUG
2 stops12h 29mDelta
Deal found 3/27$326
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/131:38 pmBOI - STL
1 stop8h 07mAmerican Airlines
Tue 5/205:19 amSTL - BOI
1 stop8h 26mAmerican Airlines
Deal found 3/27$332
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/176:00 amEUG - STL
1 stop6h 15mAlaska Airlines
Sat 4/196:44 amSTL - EUG
1 stop7h 41mAlaska Airlines
Deal found 3/27$336
This Hawaiian Airlines deal was found by Cheapflights users on 3/27. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/186:00 amEUG - STL
1 stop6h 15mHawaiian Airlines
Sun 4/206:44 amSTL - EUG
1 stop7h 47mHawaiian Airlines
Deal found 3/27$346

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 March 28, 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

Wed 5/14

5:00 pm-12:33 am

1 stop5h 33m

Lambert-St Louis

Wed 5/28

6:05 pm-11:25 pm

1 stop7h 20m

$232

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 4/22

11:59 pm-10:26 am

1 stop8h 27m

Lambert-St Louis

Tue 5/6

6:00 am-10:24 am

1 stop6h 24m

$234

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 5/1

6:20 am-3:07 pm

1 stop6h 47m

Lambert-St Louis

Sun 5/4

9:55 pm-3:42 pm

1 stop19h 47m

$248

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Mon 5/12

5:40 pm-12:59 am

1 stop6h 19m

Lambert-St Louis

Fri 5/16

6:05 pm-12:22 am

1 stop7h 17m

$282

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sun 5/18

1:25 pm-12:04 am

1 stop8h 39m

Lambert-St Louis

Sat 5/24

7:24 pm-12:17 am

1 stop6h 53m

$288

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 4/23

4:20 pm-11:59 pm

1 stop6h 39m

Lambert-St Louis

Wed 4/30

6:30 am-12:16 pm

1 stop6h 46m

$291

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 5/24

2:50 pm-11:50 pm

1 stop7h 00m

Lambert-St Louis

Mon 6/2

6:55 pm-11:30 pm

1 stop6h 35m

$298

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 5/2

10:43 pm-2:50 pm

2 stops14h 07m

Lambert-St Louis

Sun 5/4

6:11 pm-12:31 am

1 stop8h 20m

$322

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Fri 4/18

5:55 am-1:28 pm

1 stop5h 33m

Lambert-St Louis

Sat 4/19

10:30 am-8:59 pm

2 stops12h 29m

$326

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 5/13

1:38 pm-10:45 pm

1 stop8h 07m

Lambert-St Louis

Tue 5/20

5:19 am-12:45 pm

1 stop8h 26m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 50 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 $311). Flying from Oregon to St. Louis in March is currently the most expensive (average of $356). 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 March 28, 2025.

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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 March 28, 2025.
Read through reviews of airlines operating flights from Oregon to St. Louis, such as Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Boarding

8.2

Overall

8.1

Food

7.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $109. However, be on the lookout for offers from Alaska Airlines and Southwest, 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 Eugene - Lambert-St Louis or Boise Air Term. Gowen Fld - Lambert-St Louis, Portland - Lambert-St Louis is the most popular route from Oregon to St. Louis.

  • What are the cheapest flights from Oregon to St. Louis?

    On average you can expect to pay $209 for a flight from Oregon to St. Louis. The cheapest flight overall is $209 while the most popular route, (Portland - Lambert-St Louis) is currently priced at $223.

  • 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 $311). Flying from Oregon to St. Louis in March is currently the most expensive (average of $356). 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 Oregon?

Book flights to Oregon if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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Alternative routes for Oregon to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$110Average$203FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$418FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$431FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$228Average$514FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$251Average$563FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$252Average$504FlexibilityNo cancel feeOn-time63%
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