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 $95. 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 Eugene - Lambert-St Louis or Medford - Lambert-St Louis, Portland - Lambert-St Louis is the most popular route from Oregon to St. Louis.

What are the most popular airlines that fly from Oregon to St. Louis?

The most popular airlines flying from Oregon to St. Louis are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

How far in advance should I book a flight from Oregon to St. Louis?

Travelers have found it’s best to book a flight 31 days in advance to save up to 105% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 31 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Oregon to St. Louis 1-2 weeks in advance for as low as $303, or $452 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from Oregon in January are about $380 on average during January, but can be found for as low as $198.

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.

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.

$95+ Flights from Oregon to St. Louis

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Cheap flight deals from Oregon to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$227 (United Airlines)
One-way from	$95 (Mytrip)
Popular in	December
Cheapest in	January
Average price	$356

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. 7% potential increase in price ($30 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 24, 2025.

Wed 6/412:54 pmPDX - STL

1 stop7h 21mUnited Airlines

Wed 6/117:10 pmSTL - PDX

1 stop7h 20mUnited Airlines

Deal found 4/23

$227

Sun 5/256:35 amPDX - STL

1 stop24h 34mFrontier

Wed 6/48:11 pmSTL - PDX

1 stop16h 04mFrontier

Deal found 4/23

$231

Tue 5/275:00 pmPDX - STL

1 stop5h 33mDelta

Tue 6/37:19 pmSTL - PDX

1 stop6h 24mDelta

Deal found 4/23

$263

Wed 5/143:24 pmPDX - STL

1 stop6h 27mAmerican Airlines

Wed 5/285:00 amSTL - PDX

1 stop7h 24mAmerican Airlines

Deal found 4/23

$267

Wed 5/285:40 pmBOI - STL

1 stop5h 53mDelta

Mon 6/26:05 pmSTL - BOI

1 stop7h 17mDelta

Deal found 4/23

$287

Sun 6/17:07 pmBOI - STL

1 stop8h 56mUnited Airlines

Thu 6/55:20 amSTL - BOI

1 stop5h 26mUnited Airlines

Deal found 4/23

$307

Sat 6/77:00 amEUG - STL

2 stops12h 32mDelta

Wed 6/115:44 pmSTL - EUG

2 stops8h 00mDelta

Deal found 4/22

$314

Mon 5/52:30 pmPDX - STL

1 stop7h 29mMultiple Airlines

Mon 5/126:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/22

$315

Sat 6/289:15 pmPDX - STL

1 stop8h 45mSouthwest

Sat 7/53:25 pmSTL - PDX

1 stop10h 10mSouthwest

Deal found 4/23

$328

Mon 5/266:03 amEUG - STL

1 stop6h 04mHawaiian Airlines

Sat 6/147:32 pmSTL - EUG

1 stop6h 27mHawaiian Airlines

Deal found 4/23

$336

Thu 6/51:05 pmMFR - STL

1 stop5h 43mUnited Airlines

Thu 6/126:10 amSTL - MFR

1 stop7h 49mUnited Airlines

Deal found 4/23

$342

Mon 5/265:30 amEUG - STL

2 stops16h 34mAlaska Airlines

Sat 6/147:32 pmSTL - EUG

1 stop6h 27mAlaska Airlines

Deal found 4/23

$355

Best flights from Oregon to St. Louis
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 April 24, 2025.

Wed 6/412:54 pmPDX - STL

1 stop7h 21mUnited Airlines

Wed 6/117:10 pmSTL - PDX

1 stop7h 20mUnited Airlines

Deal found 4/23

$227

Sun 5/256:35 amPDX - STL

1 stop24h 34mFrontier

Wed 6/48:11 pmSTL - PDX

1 stop16h 04mFrontier

Deal found 4/23

$231

Tue 5/275:00 pmPDX - STL

1 stop5h 33mDelta

Tue 6/37:19 pmSTL - PDX

1 stop6h 24mDelta

Deal found 4/23

$263

Wed 5/143:24 pmPDX - STL

1 stop6h 27mAmerican Airlines

Wed 5/285:00 amSTL - PDX

1 stop7h 24mAmerican Airlines

Deal found 4/23

$267

Mon 5/52:30 pmPDX - STL

1 stop7h 29mMultiple Airlines

Mon 5/126:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/22

$315

Sat 6/289:15 pmPDX - STL

1 stop8h 45mSouthwest

Sat 7/53:25 pmSTL - PDX

1 stop10h 10mSouthwest

Deal found 4/23

$328

Mon 5/266:03 amEUG - STL

1 stop6h 04mHawaiian Airlines

Sat 6/147:32 pmSTL - EUG

1 stop6h 27mHawaiian Airlines

Deal found 4/23

$336

Mon 5/265:30 amEUG - STL

2 stops16h 34mAlaska Airlines

Sat 6/147:32 pmSTL - EUG

1 stop6h 27mAlaska Airlines

Deal found 4/23

$355

Fri 5/3012:16 pmBOI - STL

2 stops19h 59mSpirit Airlines

Sun 6/110:10 amSTL - BOI

2 stops26h 11mSpirit Airlines

Deal found 4/23

$440

Wed 6/1811:40 pmBOI - STL

1 stop9h 03mDelta

Tue 6/246:30 amSTL - BOI

1 stop8h 23mDelta

Deal found 4/22

$287

Fri 5/305:43 pmBOI - STL

1 stop5h 16mUnited Airlines

Sun 6/15:20 amSTL - BOI

1 stop5h 26mUnited Airlines

Deal found 4/23

$340

Sat 6/77:00 amEUG - STL

2 stops12h 32mDelta

Wed 6/115:44 pmSTL - EUG

2 stops8h 00mDelta

Deal found 4/22

$314

Last-minute flights from Oregon to St. Louis
Discover last-minute flight deals from Oregon to St. Louis. Data last updated April 24, 2025 and is based on user searches.

Tue 4/292:15 pmBOI - STL

1 stop8h 21mDelta

Sat 5/35:00 pmSTL - BOI

1 stop6h 48mDelta

Deal found 4/23

$535

Tue 4/296:30 amBOI - STL

2 stops8h 17mUnited Airlines

Sat 5/34:45 pmSTL - BOI

1 stop7h 07mUnited Airlines

Deal found 4/23

$665

Tue 4/296:30 amBOI - STL

2 stops10h 32mAlaska Airlines

Sat 5/39:52 amSTL - BOI

2 stops9h 09mAlaska Airlines

Deal found 4/23

$730

Wed 4/304:18 pmPDX - STL

1 stop5h 30mUnited Airlines

Thu 5/16:00 amSTL - PDX

1 stop9h 01mUnited Airlines

Deal found 4/23

$378

Wed 4/305:10 amPDX - STL

2 stops10h 40mSouthwest

Thu 5/15:20 amSTL - PDX

1 stop8h 05mSouthwest

Deal found 4/23

$444

Thu 5/16:20 amPDX - STL

1 stop6h 47mFrontier

Thu 5/159:55 pmSTL - PDX

1 stop19h 47mFrontier

Deal found 4/23

$241

Thu 5/110:30 amPDX - STL

2 stops11h 20mAlaska Airlines

Thu 5/1510:31 amSTL - PDX

1 stop8h 04mAlaska Airlines

Deal found 4/23

$488

Sat 5/312:59 amPDX - STL

1 stop7h 31mDelta

Tue 5/137:30 amSTL - PDX

2 stops11h 29mDelta

Deal found 4/23

$344

Mon 5/52:30 pmPDX - STL

1 stop7h 29mMultiple Airlines

Mon 5/126:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/22

$315

Mon 5/54:20 pmPDX - STL

1 stop5h 38mUnited Airlines

Mon 5/121:41 pmSTL - PDX

2 stops9h 12mUnited Airlines

Deal found 4/22

$350

Mon 5/125:00 pmBOI - STL

1 stop6h 35mSouthwest

Sat 5/178:35 amSTL - BOI

1 stop9h 55mSouthwest

Deal found 4/22

$410

Tue 5/135:10 pmBOI - STL

1 stop5h 48mAmerican Airlines

Tue 5/205:19 amSTL - BOI

1 stop8h 26mAmerican Airlines

Deal found 4/23

$397

One-way flights from Oregon to St. Louis
Search for one-way flight options from Oregon to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Tue 4/296:20 amPDX - STL

1 stop25h 41mFrontier

Deal found 4/23

$95

Thu 10/21:24 pmPDX - STL

1 stop8h 35mAlaska Airlines

Deal found 4/23

$113

Tue 5/275:00 pmPDX - STL

1 stop5h 33mDelta

Deal found 4/23

$114

Sun 9/212:30 pmPDX - STL

1 stop7h 29mHawaiian Airlines

Deal found 4/23

$134

Thu 6/2611:59 pmPDX - STL

1 stop9h 37mSun Country Air

Deal found 4/23

$143

Fri 5/161:38 pmBOI - STL

1 stop8h 07mAmerican Airlines

Deal found 4/24

$144

Sat 5/171:37 pmPDX - STL

2 stops17h 38mSpirit Airlines

Deal found 4/23

$147

Sat 5/176:00 amPDX - STL

1 stop9h 07mUnited Airlines

Deal found 4/23

$149

Wed 5/285:40 pmPDX - STL

3 stops24h 30mMultiple Airlines

Deal found 4/23

$150

Wed 5/73:24 pmPDX - STL

1 stop6h 27mAmerican Airlines

Deal found 4/23

$154

Sun 5/186:03 amEUG - STL

1 stop6h 04mHawaiian Airlines

Deal found 4/23

$173

Sun 5/186:00 amRDM - STL

1 stop6h 07mHawaiian Airlines

Deal found 4/23

$173

Cheapflights Fare Finder

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

Price

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 6/4

12:54 pm-10:15 pm

1 stop7h 21m

Lambert-St Louis

Wed 6/11

7:10 pm-12:30 am

1 stop7h 20m

$227

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sun 5/25

6:35 am-9:09 am

1 stop24h 34m

Lambert-St Louis

Wed 6/4

8:11 pm-10:15 am

1 stop16h 04m

$231

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 5/27

5:00 pm-12:33 am

1 stop5h 33m

Lambert-St Louis

Tue 6/3

7:19 pm-11:43 pm

1 stop6h 24m

$263

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 5/14

3:24 pm-11:51 pm

1 stop6h 27m

Lambert-St Louis

Wed 5/28

5:00 am-10:24 am

1 stop7h 24m

$267

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 5/28

5:40 pm-12:33 am

1 stop5h 53m

Lambert-St Louis

Mon 6/2

6:05 pm-12:22 am

1 stop7h 17m

$287

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sun 6/1

7:07 pm-5:03 am

1 stop8h 56m

Lambert-St Louis

Thu 6/5

5:20 am-9:46 am

1 stop5h 26m

$307

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Sat 6/7

7:00 am-9:32 pm

2 stops12h 32m

Lambert-St Louis

Wed 6/11

5:44 pm-11:44 pm

2 stops8h 00m

$314

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Mon 5/5

2:30 pm-11:59 pm

1 stop7h 29m

Lambert-St Louis

Mon 5/12

6:53 pm-12:38 am

1 stop7h 45m

$315

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 6/28

9:15 pm-8:00 am

1 stop8h 45m

Lambert-St Louis

Sat 7/5

3:25 pm-11:35 pm

1 stop10h 10m

$328

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Mon 5/26

6:03 am-2:07 pm

1 stop6h 04m

Lambert-St Louis

Sat 6/14

7:32 pm-11:59 pm

1 stop6h 27m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 49 results

...

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?

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

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

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

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

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,918 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,287 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,920 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,393 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,685 reviews

Alaska Airlines

8.0

Very good

9,918 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 $95. 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 Eugene - Lambert-St Louis or Medford - 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 $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

Fenton

Maryland Heights

Fairview Heights

Collinsville

Wentzville

Eureka

St. Peters

Festus

Glencoe

Alton

Farmington

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Top 6 airlines flying from Oregon to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$118	Average$203	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$192	Average$461	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$198	Average$429	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$226	Average$556	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$228	Average$520	FlexibilityNo cancel fee	On-time75%
Southwest	Cheapest$252	Average$465	FlexibilityNo cancel fee	On-time63%

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$95+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Oregon to St. Louis with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

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 April 24, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Oregon to St. Louis

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 April 24, 2025.

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 April 24, 2025.

Cheapflights Fare Finder

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

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.

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?

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 April 24, 2025.

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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.

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?

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

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

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

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

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

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

Traveling to a place near Oregon?

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Alternative routes for Oregon to St. Louis

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Top 6 airlines flying from Oregon to St. Louis

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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 April 24, 2025.