HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oregon

$111+ Cheap flights from St. Louis (STL) to Oregon

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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Oregon with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Oregon

Keep the following information in mind while searching for St. Louis to Oregon flight deals. Data was last updated March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$227
(American Airlines)

One-way from

$111
(Alaska Airlines)

Popular in

March

Cheapest in

September

Average price

$463
Provider with most accurate pricing for Lambert-St Louis-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Portland flights.
Search Deals
From Lambert-St Louis to Oregon
Search Deals
One-way flight from Lambert-St Louis to Oregon
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from St. Louis to Oregon

Cheapest flights from St. Louis to Oregon
Explore the most affordable flight options available from St. Louis to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

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.
Mon 4/286:20 pmSTL - PDX
1 stop7h 42mAmerican Airlines
Fri 5/211:52 pmPDX - STL
1 stop7h 30mAmerican 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 5/286:05 pmSTL - PDX
1 stop7h 20mDelta
Tue 6/1712:44 amPDX - STL
1 stop7h 50mDelta
Deal found 3/25$233
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.
Tue 4/225:25 pmSTL - BOI
1 stop6h 05mSouthwest
Tue 4/294:40 pmBOI - STL
1 stop5h 55mSouthwest
Deal found 3/25$242
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/26:51 pmSTL - PDX
1 stop7h 46mFrontier
Fri 4/46:40 amPDX - STL
1 stop24h 26mFrontier
Deal found 3/25$280
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/166:44 amSTL - PDX
1 stop6h 08mAlaska Airlines
Sun 4/208:00 amPDX - STL
1 stop13h 59mAlaska Airlines
Deal found 3/25$284
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:53 pmSTL - BOI
1 stop17h 58mFrontier
Sun 5/2512:36 pmBOI - STL
1 stop19h 33mFrontier
Deal found 3/25$296
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 6/143:25 pmSTL - PDX
1 stop10h 10mSouthwest
Sat 6/218:15 pmPDX - STL
1 stop11h 45mSouthwest
Deal found 3/25$309
This Delta deal was found by Cheapflights users on 3/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/77:19 pmSTL - EUG
1 stop6h 37mDelta
Sat 5/177:15 amEUG - STL
2 stops12h 17mDelta
Deal found 3/24$310
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/106:10 pmSTL - PDX
2 stops25h 55mSpirit Airlines
Wed 4/167:01 pmPDX - STL
2 stops20h 14mSpirit Airlines
Deal found 3/25$311
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/186:00 amSTL - PDX
1 stop8h 22mUnited Airlines
Tue 6/2411:59 pmPDX - STL
1 stop8h 40mUnited Airlines
Deal found 3/25$313
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.
Tue 6/36:05 pmSTL - BOI
1 stop7h 17mDelta
Sat 6/712:50 pmBOI - STL
1 stop7h 42mDelta
Deal found 3/25$318
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/127:04 amSTL - EUG
1 stop7h 14mAmerican Airlines
Tue 4/1512:57 pmEUG - STL
1 stop7h 31mAmerican Airlines
Deal found 3/25$327

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Oregon 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 26, 2025.
Use the filters below to find and compare flights from St. Louis to Oregon that are best for you.

Fly from

St. Louis

Fly to

Oregon

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 4/28

6:20 pm-12:02 am

1 stop7h 42m

Portland

Fri 5/2

11:52 pm-9:22 am

1 stop7h 30m

$227

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/28

6:05 pm-11:25 pm

1 stop7h 20m

Portland

Tue 6/17

12:44 am-10:34 am

1 stop7h 50m

$233

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 4/22

5:25 pm-10:30 pm

1 stop6h 05m

Boise Air Term. Gowen Fld

Tue 4/29

4:40 pm-11:35 pm

1 stop5h 55m

$242

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 4/9

6:51 pm-12:37 am

1 stop7h 46m

Portland

Sun 4/13

6:40 am-9:06 am

1 stop24h 26m

$280

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 4/16

6:44 am-10:52 am

1 stop6h 08m

Portland

Sun 4/20

8:00 am-11:59 pm

1 stop13h 59m

$284

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/21

6:53 pm-11:51 am

1 stop17h 58m

Boise Air Term. Gowen Fld

Sun 5/25

12:36 pm-9:09 am

1 stop19h 33m

$296

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 6/14

3:25 pm-11:35 pm

1 stop10h 10m

Portland

Sat 6/21

8:15 pm-10:00 am

1 stop11h 45m

$309

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Wed 5/7

7:19 pm-11:56 pm

1 stop6h 37m

Eugene

Sat 5/17

7:15 am-9:32 pm

2 stops12h 17m

$310

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 4/10

6:10 pm-6:05 pm

2 stops25h 55m

Portland

Wed 4/16

7:01 pm-5:15 pm

2 stops20h 14m

$311

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 6/18

6:00 am-12:22 pm

1 stop8h 22m

Portland

Tue 6/24

11:59 pm-10:39 am

1 stop8h 40m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 58 results
1
2
3
...
6

Best time to book a flight from St. Louis to Oregon

Have a flexible travel schedule? Discover the best time to fly to Oregon from St. Louis 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 St. Louis to Oregon

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

Currently, November is the cheapest month in which you can book a flight from St. Louis to Oregon (average of $277). Flying from St. Louis to Oregon in March is currently the most expensive (average of $370). 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 STL to OR?

Find hourly flight availability from St. Louis to Oregon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 26, 2025.

When flying from St. Louis to Oregon, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Oregon by month

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

In terms of precipitation, rainfall in Oregon ranges from 0.7 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Oregon when rainfall is around 0.7 in.

Temperature in Oregon by month

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

If weather is an important factor for your trip to Oregon, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Oregon

Get insights into the airlines that provide service to Oregon. 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 Oregon. Reviews last updated March 26, 2025.
Read through reviews of airlines operating flights from St. Louis to Oregon, such as Southwest, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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
9,789 reviews
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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
7,891 reviews
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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
2,330 reviews
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Boarding

8.2

Entertainment

7.6

Crew

8.6

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 St. Louis to Oregon. 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 from for flights from St. Louis to Oregon?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Oregon. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How popular is this St. Louis to Oregon flight route?

    The Lambert-St Louis to Oregon flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $111. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from St. Louis to Oregon for a low price.

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

    While some choose either Lambert-St Louis - Boise Air Term. Gowen Fld or Lambert-St Louis - Eugene, Lambert-St Louis - Portland is the most popular route from St. Louis to Oregon.

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

    Yes. In addition to deals on St. Louis to Oregon flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Oregon.

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

    Yes. Cheapflights offers flight deals from St. Louis to Oregon 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 St. Louis to Oregon?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Oregon (average of $277). Flying from St. Louis to Oregon in March is currently the most expensive (average of $370). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Seattle flights
Kansas City to Seattle flights
St. Louis to Las Vegas flights
St. Louis to Denver flights
Kansas City to O'Hare Intl flights
St. Louis to Orlando flights
St. Louis to Miami flights
Kansas City to John F Kennedy Intl flights
Kansas City to Las Vegas flights
Kansas City to Boston flights
St. Louis to Newark flights
Kansas City to Miami flights
Kansas City to Newark flights
St. Louis to John F Kennedy Intl flights
Kansas City to Los Angeles flights
Kansas City to Dallas/Fort Worth flights
Kansas City to Hobby flights
St. Louis to LaGuardia flights
St. Louis to Sky Harbor Intl flights
Kansas City to Denver flights
Kansas City to Sky Harbor Intl flights
Kansas City to LaGuardia flights
St. Louis to Dallas/Fort Worth flights
Kansas City to San Francisco flights
Kansas City to Portland flights
St. Louis to Dulles Intl flights
St. Louis to Hobby flights
St. Louis to Atlanta flights
Kansas City to Atlanta flights
St. Louis to Boston flights
Kansas City to Orlando flights
St. Louis to San Francisco flights
Kansas City to Dulles Intl flights
St. Louis to Los Angeles flights
Kansas City to San Diego flights
Kansas City to George Bush Intcntl flights
St. Louis to O'Hare Intl flights
St. Louis to Honolulu flights
Kansas City to Tampa flights
St. Louis to George Bush Intcntl flights
Kansas City to Reagan-National flights
Kansas City to Fort Lauderdale flights
St. Louis to Philadelphia flights
Kansas City to Salt Lake City flights
St. Louis to Tampa flights
St. Louis to New Orleans flights
St. Louis to Detroit flights
Kansas City to Detroit flights
St. Louis to San Diego flights
St. Louis to Reagan-National flights

Top 7 airlines flying from St. Louis to Oregon

Discover the top 7 airlines that operate flights from St. Louis to Oregon. 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$94Average$180FlexibilityNo cancel feeOn-time65%
FrontierCheapest$98Average$188FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$177Average$476FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$204Average$457FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$215Average$500FlexibilityNo cancel feeOn-time75%
DeltaCheapest$216Average$492FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$249Average$521FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.