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 $96. However, be on the lookout for offers from Delta and United 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 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 $806 for a flight from Oregon to St. Louis. The cheapest flight overall is $564 while the most popular route, (Portland - Lambert-St Louis) is currently priced at $227.

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 100% 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.

$96+ Flights from Oregon to St. Louis - Compare & Save Big

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Cheap flight deals from Oregon to St. Louis

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$227 (CheapOair)
One-way from	$96 (Mytrip)
Popular in	December
Cheapest in	January
Average price	$356
Good round-trip deal	$645 or less

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.

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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 ($29 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Oregon to Lambert-St Louis.

Search Deals

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 abril 30, 2025.

dom. 6/112:36 pmBOI - STL

1 stop19h 36mFrontier

mié. 6/48:11 pmSTL - BOI

1 stop16h 36mFrontier

Deal found 4/28

$227

mié. 6/112:12 pmPDX - STL

1 stop6h 33mUnited Airlines

lun. 6/164:32 pmSTL - PDX

1 stop8h 03mUnited Airlines

Deal found 4/29

$227

vie. 5/306:35 amPDX - STL

1 stop25h 34mFrontier

lun. 6/27:24 pmSTL - PDX

1 stop6h 55mFrontier

Deal found 4/29

$228

mar. 7/295:05 pmPDX - STL

1 stop5h 33mDelta

lun. 8/42:15 pmSTL - PDX

1 stop9h 46mDelta

Deal found 4/29

$263

dom. 6/89:55 pmPDX - STL

1 stop8h 16mAmerican Airlines

mié. 6/115:29 pmSTL - PDX

1 stop7h 29mAmerican Airlines

Deal found 4/29

$277

mié. 6/2511:40 pmBOI - STL

1 stop9h 03mDelta

lun. 6/307:15 pmSTL - BOI

1 stop4h 56mDelta

Deal found 4/29

$287

jue. 6/52:35 pmBOI - STL

1 stop5h 13mUnited Airlines

sáb. 6/75:00 amSTL - BOI

2 stops9h 32mUnited Airlines

Deal found 4/28

$292

mar. 10/1412:35 pmPDX - STL

2 stops9h 35mSouthwest

vie. 10/175:40 amSTL - PDX

1 stop6h 30mSouthwest

Deal found 4/29

$298

lun. 5/124:00 pmPDX - STL

1 stop5h 59mMultiple Airlines

vie. 5/166:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/29

$305

sáb. 5/316:00 amRDM - STL

1 stop5h 34mDelta

mar. 6/36:45 amSTL - RDM

2 stops14h 04mDelta

Deal found 4/29

$306

lun. 5/266:03 amEUG - STL

1 stop6h 04mHawaiian Airlines

sáb. 6/147:32 pmSTL - EUG

1 stop6h 27mHawaiian Airlines

Deal found 4/28

$336

mié. 6/116:35 amEUG - STL

2 stops8h 14mDelta

mar. 7/87:15 amSTL - EUG

2 stops11h 27mDelta

Deal found 4/28

$338

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 abril 30, 2025.

dom. 6/112:36 pmBOI - STL

1 stop19h 36mFrontier

mié. 6/48:11 pmSTL - BOI

1 stop16h 36mFrontier

Deal found 4/28

$227

mar. 6/311:59 pmPDX - STL

1 stop7h 00mAmerican Airlines

vie. 6/65:29 pmSTL - PDX

1 stop9h 07mAmerican Airlines

Deal found 4/29

$227

dom. 6/89:15 pmPDX - STL

1 stop9h 15mSouthwest

mié. 6/115:45 pmSTL - PDX

1 stop8h 10mSouthwest

Deal found 4/28

$263

mar. 7/2911:59 pmPDX - STL

1 stop7h 32mUnited Airlines

dom. 8/35:00 amSTL - PDX

1 stop6h 42mUnited Airlines

Deal found 4/29

$264

mar. 5/278:00 pmPDX - STL

2 stops12h 47mDelta

mar. 6/37:19 pmSTL - PDX

1 stop6h 24mDelta

Deal found 4/28

$266

lun. 5/124:00 pmPDX - STL

1 stop5h 59mMultiple Airlines

vie. 5/166:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/28

$288

lun. 5/266:03 amEUG - STL

1 stop6h 04mHawaiian Airlines

sáb. 6/147:32 pmSTL - EUG

1 stop6h 27mHawaiian Airlines

Deal found 4/28

$336

sáb. 5/3110:59 amRDM - STL

1 stop11h 05mAlaska Airlines

mar. 6/36:18 pmSTL - RDM

1 stop7h 41mAlaska Airlines

Deal found 4/29

$346

vie. 5/166:20 amPDX - STL

1 stop25h 39mFrontier

sáb. 5/247:55 pmSTL - PDX

1 stop6h 22mFrontier

Deal found 4/27

$231

mié. 6/256:10 pmBOI - STL

1 stop5h 33mDelta

lun. 6/307:15 pmSTL - BOI

1 stop4h 56mDelta

Deal found 4/28

$287

jue. 6/52:35 pmBOI - STL

1 stop5h 13mUnited Airlines

sáb. 6/75:00 amSTL - BOI

2 stops9h 32mUnited Airlines

Deal found 4/28

$292

sáb. 5/316:00 amRDM - STL

1 stop5h 34mDelta

mar. 6/36:45 amSTL - RDM

2 stops14h 04mDelta

Deal found 4/29

$306

Last-minute flights from Oregon to St. Louis
Discover last-minute flight deals from Oregon to St. Louis. Data last updated abril 30, 2025 and is based on user searches.

dom. 5/49:35 amPDX - STL

1 stop12h 24mAlaska Airlines

mar. 5/136:30 amSTL - PDX

1 stop6h 22mAlaska Airlines

Deal found 4/29

$389

dom. 5/45:15 amPDX - STL

1 stop6h 13mDelta

mar. 5/137:19 pmSTL - PDX

1 stop6h 23mDelta

Deal found 4/29

$390

jue. 5/86:20 amPDX - STL

1 stop24h 49mFrontier

dom. 5/119:55 pmSTL - PDX

1 stop19h 47mFrontier

Deal found 4/28

$241

jue. 5/85:40 pmPDX - STL

3 stops24h 30mMultiple Airlines

dom. 5/111:00 pmSTL - PDX

3 stops29h 45mMultiple Airlines

Deal found 4/28

$424

vie. 5/92:00 pmBOI - STL

1 stop7h 45mUnited Airlines

sáb. 5/106:30 amSTL - BOI

1 stop6h 44mUnited Airlines

Deal found 4/28

$354

vie. 5/95:10 pmBOI - STL

1 stop5h 48mAmerican Airlines

lun. 5/125:19 amSTL - BOI

1 stop8h 26mAmerican Airlines

Deal found 4/29

$401

vie. 5/94:20 pmPDX - STL

1 stop5h 38mUnited Airlines

dom. 5/116:30 amSTL - PDX

2 stops8h 42mUnited Airlines

Deal found 4/29

$407

vie. 5/95:00 amEUG - STL

2 stops8h 47mUnited Airlines

dom. 5/115:20 amSTL - EUG

2 stops8h 54mUnited Airlines

Deal found 4/27

$455

vie. 5/91:10 pmEUG - STL

1 stop7h 35mAmerican Airlines

dom. 5/115:19 amSTL - EUG

1 stop9h 11mAmerican Airlines

Deal found 4/27

$613

lun. 5/124:00 pmPDX - STL

1 stop5h 59mMultiple Airlines

vie. 5/166:53 pmSTL - PDX

1 stop7h 45mMultiple Airlines

Deal found 4/29

$305

lun. 5/121:45 pmPDX - STL

1 stop7h 00mUnited Airlines

jue. 5/156:11 pmSTL - PDX

1 stop8h 20mUnited Airlines

Deal found 4/28

$307

mar. 5/135:10 pmBOI - STL

1 stop5h 48mAmerican Airlines

mar. 5/205:19 amSTL - BOI

1 stop8h 26mAmerican Airlines

Deal found 4/29

$344

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 abril 30, 2025.

dom. 5/46:20 amPDX - STL

1 stop24h 49mFrontier

Deal found 4/29

$96

lun. 6/211:11 pmPDX - STL

1 stop8h 24mDelta

Deal found 4/29

$114

mar. 6/35:30 amPDX - STL

2 stops9h 01mUnited Airlines

Deal found 4/29

$119

lun. 9/12:30 pmPDX - STL

1 stop7h 29mHawaiian Airlines

Deal found 4/29

$134

jue. 6/2611:59 pmPDX - STL

1 stop9h 37mSun Country Air

Deal found 4/29

$143

lun. 6/25:40 pmBOI - STL

1 stop6h 19mDelta

Deal found 4/28

$144

sáb. 5/311:37 pmPDX - STL

2 stops17h 38mSpirit Airlines

Deal found 4/29

$147

dom. 6/11:37 pmPDX - STL

3 stops28h 33mMultiple Airlines

Deal found 4/29

$165

vie. 6/67:00 amEUG - STL

2 stops11h 49mDelta

Deal found 4/28

$173

dom. 6/11:15 pmEUG - STL

1 stop7h 30mAmerican Airlines

Deal found 4/29

$174

lun. 5/124:20 pmBOI - STL

1 stop6h 39mAlaska Airlines

Deal found 4/29

$179

vie. 5/92:00 pmBOI - STL

1 stop7h 45mUnited Airlines

Deal found 4/28

$180

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

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

dom. 6/1

12:36 pm-9:12 am

1 stop19h 36m

Lambert-St Louis

mié. 6/4

8:11 pm-11:47 am

1 stop16h 36m

$227

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mar. 6/3

11:59 pm-8:59 am

1 stop7h 00m

Lambert-St Louis

vie. 6/6

5:29 pm-12:36 am

1 stop9h 07m

$227

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

vie. 5/16

6:20 am-9:59 am

1 stop25h 39m

Lambert-St Louis

sáb. 5/24

7:55 pm-12:17 am

1 stop6h 22m

$231

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

dom. 6/8

9:15 pm-8:30 am

1 stop9h 15m

Lambert-St Louis

mié. 6/11

5:45 pm-11:55 pm

1 stop8h 10m

$263

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mar. 7/29

11:59 pm-9:31 am

1 stop7h 32m

Lambert-St Louis

dom. 8/3

5:00 am-9:42 am

1 stop6h 42m

$264

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mar. 5/27

8:00 pm-10:47 am

2 stops12h 47m

Lambert-St Louis

mar. 6/3

7:19 pm-11:43 pm

1 stop6h 24m

$266

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

mié. 6/25

6:10 pm-12:43 am

1 stop5h 33m

Lambert-St Louis

lun. 6/30

7:15 pm-11:11 pm

1 stop4h 56m

$287

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

lun. 5/12

4:00 pm-11:59 pm

1 stop5h 59m

Lambert-St Louis

vie. 5/16

6:53 pm-12:38 am

1 stop7h 45m

$288

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

jue. 6/5

2:35 pm-8:48 pm

1 stop5h 13m

Lambert-St Louis

sáb. 6/7

5:00 am-1:32 pm

2 stops9h 32m

$292

RedmondSt. Louis

RDM - STL

RDMSTL

Bend/Redmond

sáb. 5/31

6:00 am-1:34 pm

1 stop5h 34m

Lambert-St Louis

mar. 6/3

6:45 am-6:49 pm

2 stops14h 04m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 52 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

9,968 reviews

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

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

4,295 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

7,936 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

2,402 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

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 $96. However, be on the lookout for offers from Delta and United 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 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 $806 for a flight from Oregon to St. Louis. The cheapest flight overall is $564 while the most popular route, (Portland - Lambert-St Louis) is currently priced at $227.
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

O'Fallon

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Oregon to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$118	Average$210	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$192	Average$461	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$197	Average$419	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$226	Average$553	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$228	Average$521	FlexibilityNo cancel fee	On-time75%
Southwest	Cheapest$252	Average$463	FlexibilityNo cancel fee	On-time63%

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$96+ 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 5/4. 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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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 abril 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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 abril 30, 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 abril 30, 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 abril 30, 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?

What are the cheapest flights 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?

Browse thousands of different options on Cheapflights for your next trip

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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 abril 30, 2025.