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St. Louis

$128+ 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$244
(CheapOair)

One-way from

$128
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$403

Good round-trip deal

$499 or less
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. 6% potential increase in price ($26 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 June 2025
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Price to beat on a round-trip 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 June 12, 2025.

This CheapOair deal was found by Cheapflights users on 6/10. 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 10/16:05 amPDX - STL
1 stop25h 02mFrontier
Tue 10/77:52 pmSTL - PDX
1 stop28h 47mFrontier
Deal found 6/10$244
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 8/205:45 pmEUG - STL
1 stop18h 54mAlaska Airlines
Sun 8/246:30 pmSTL - EUG
1 stop7h 29mAlaska Airlines
Deal found 6/12$260
This Delta deal was found by Cheapflights users on 6/12. 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 8/206:30 amEUG - STL
2 stops9h 46mDelta
Sun 8/247:11 pmSTL - EUG
1 stop6h 33mDelta
Deal found 6/12$266
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/85:42 pmBOI - STL
1 stop5h 17mUnited Airlines
Tue 7/155:15 amSTL - BOI
1 stop5h 31mUnited Airlines
Deal found 6/10$279
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Thu 8/146:00 amEUG - STL
1 stop9h 30mAmerican Airlines
Sun 8/176:14 pmSTL - EUG
1 stop7h 18mAmerican Airlines
Deal found 6/12$279
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Wed 8/133:22 pmPDX - STL
1 stop6h 54mAmerican Airlines
Wed 8/201:42 pmSTL - PDX
1 stop11h 38mAmerican Airlines
Deal found 6/9$282
This Delta deal was found by Cheapflights users on 6/11. 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 8/306:00 amBOI - STL
1 stop6h 29mDelta
Sun 8/317:35 amSTL - BOI
1 stop5h 20mDelta
Deal found 6/11$287
This Delta deal was found by Cheapflights users on 6/11. 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 7/1011:11 pmPDX - STL
1 stop8h 22mDelta
Tue 7/157:15 pmSTL - PDX
1 stop6h 20mDelta
Deal found 6/11$297
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 8/235:00 amPDX - STL
2 stops8h 44mUnited Airlines
Sun 8/315:15 amSTL - PDX
1 stop6h 13mUnited Airlines
Deal found 6/10$302
This Southwest deal was found by Cheapflights users on 6/10. 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 7/115:50 amPDX - STL
1 stop7h 10mSouthwest
Fri 7/182:50 pmSTL - PDX
1 stop7h 10mSouthwest
Deal found 6/10$307
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 10/77:44 pmMFR - STL
1 stop17h 11mAlaska Airlines
Sat 10/183:57 pmSTL - MFR
1 stop10h 25mAlaska Airlines
Deal found 6/11$320
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Sun 7/1310:23 amPDX - STL
2 stops21h 29mSpirit Airlines
Wed 7/1611:24 amSTL - PDX
2 stops23h 54mSpirit Airlines
Deal found 6/11$325

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 June 12, 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 10/1

6:05 am-9:07 am

1 stop25h 02m

Lambert-St Louis

Tue 10/7

7:52 pm-10:39 pm

1 stop28h 47m

$244

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Wed 8/20

5:45 pm-2:39 pm

1 stop18h 54m

Lambert-St Louis

Sun 8/24

6:30 pm-11:59 pm

1 stop7h 29m

$260

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Wed 8/20

6:30 am-6:16 pm

2 stops9h 46m

Lambert-St Louis

Sun 8/24

7:11 pm-11:44 pm

1 stop6h 33m

$266

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Tue 7/8

5:42 pm-11:59 pm

1 stop5h 17m

Lambert-St Louis

Tue 7/15

5:15 am-9:46 am

1 stop5h 31m

$279

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Thu 8/14

6:00 am-5:30 pm

1 stop9h 30m

Lambert-St Louis

Sun 8/17

6:14 pm-11:32 pm

1 stop7h 18m

$279

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 8/13

3:22 pm-12:16 am

1 stop6h 54m

Lambert-St Louis

Wed 8/20

1:42 pm-11:20 pm

1 stop11h 38m

$282

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sat 8/30

6:00 am-1:29 pm

1 stop6h 29m

Lambert-St Louis

Sun 8/31

7:35 am-11:55 am

1 stop5h 20m

$287

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 7/10

12:40 am-8:34 am

1 stop5h 54m

Lambert-St Louis

Mon 7/21

5:37 pm-11:18 pm

1 stop7h 41m

$297

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 8/23

5:00 am-3:44 pm

2 stops8h 44m

Lambert-St Louis

Sun 8/31

5:15 am-9:28 am

1 stop6h 13m

$302

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 7/11

5:50 am-3:00 pm

1 stop7h 10m

Lambert-St Louis

Fri 7/18

2:50 pm-8:00 pm

1 stop7h 10m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 59 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 June 12, 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 June 12, 2025.
Read through reviews of airlines operating flights from Oregon to St. Louis, such as Alaska Airlines, Southwest and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Frontier, with whom users have recently found tickets for as low as $128. However, be on the lookout for offers from Alaska Airlines and Hawaiian 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.

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

    On average you can expect to pay $555 for a flight from Oregon to St. Louis. The cheapest flight overall is $376 while the most popular route, (Portland - Lambert-St Louis) is currently priced at $276.

  • 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$221FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$433FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$196Average$426FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$226Average$521FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$244Average$493FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$252Average$448FlexibilityNo cancel feeOn-time63%

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