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$139+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$254
(Alaska Airlines)

One-way from

$139
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$385

Good round-trip deal

$459 or less
From Lambert-St Louis to Oregon
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One-way flight from Lambert-St Louis to Oregon
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Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 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 Lambert-St Louis to Oregon.
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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 June 12, 2025.

This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:35 pmSTL - BOI
1 stop8h 05mAlaska Airlines
Wed 9/246:35 amBOI - STL
1 stop7h 04mAlaska Airlines
Deal found 6/10$254
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:59 pmSTL - BOI
1 stop6h 18mDelta
Thu 9/2511:30 pmBOI - STL
1 stop7h 40mDelta
Deal found 6/10$255
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/133:35 pmSTL - EUG
1 stop7h 29mAlaska Airlines
Thu 9/181:35 pmEUG - STL
1 stop8h 24mAlaska Airlines
Deal found 6/10$260
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.
Mon 9/84:00 pmSTL - BOI
2 stops8h 05mSouthwest
Mon 9/154:30 pmBOI - STL
1 stop6h 25mSouthwest
Deal found 6/10$260
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/74:50 pmSTL - EUG
1 stop6h 15mUnited Airlines
Sat 10/116:00 amEUG - STL
1 stop8h 45mUnited Airlines
Deal found 6/11$261
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:15 amSTL - BOI
1 stop8h 31mAmerican Airlines
Sun 8/175:15 pmBOI - STL
1 stop6h 01mAmerican Airlines
Deal found 6/10$271
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:29 pmSTL - PDX
1 stop29h 10mFrontier
Mon 9/86:05 amPDX - STL
1 stop25h 02mFrontier
Deal found 6/11$277
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.
Fri 10/106:59 pmSTL - EUG
2 stops17h 40mDelta
Tue 10/146:15 amEUG - STL
2 stops9h 42mDelta
Deal found 6/11$278
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 8/263:35 pmSTL - MFR
1 stop10h 33mAlaska Airlines
Tue 9/212:02 pmMFR - STL
1 stop24h 37mAlaska Airlines
Deal found 6/11$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 9/35:55 amSTL - PDX
1 stop10h 38mAmerican Airlines
Sat 9/66:07 amPDX - STL
1 stop7h 17mAmerican Airlines
Deal found 6/9$282
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/133:35 pmSTL - BOI
1 stop8h 05mHawaiian Airlines
Sat 9/206:35 amBOI - STL
1 stop7h 04mHawaiian Airlines
Deal found 6/10$286
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:30 amSTL - PDX
1 stop7h 07mDelta
Fri 9/1912:40 amPDX - STL
1 stop6h 04mDelta
Deal found 6/10$297

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 June 12, 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. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 9/8

6:30 pm-9:28 am

1 stop15h 58m

Boise Air Term. Gowen Fld

Mon 9/15

4:34 pm-11:59 pm

1 stop6h 25m

$254

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 8/21

6:00 am-12:19 pm

1 stop7h 19m

Boise Air Term. Gowen Fld

Tue 8/26

1:36 pm-11:14 pm

1 stop8h 38m

$255

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 9/8

4:00 pm-11:05 pm

2 stops8h 05m

Boise Air Term. Gowen Fld

Mon 9/15

4:30 pm-11:55 pm

1 stop6h 25m

$260

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Sat 9/13

3:35 pm-9:04 pm

1 stop7h 29m

Eugene

Thu 9/18

1:35 pm-11:59 pm

1 stop8h 24m

$260

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Tue 10/7

4:50 pm-9:05 pm

1 stop6h 15m

Eugene

Sat 10/11

6:00 am-4:45 pm

1 stop8h 45m

$261

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 8/18

7:29 pm-10:39 pm

1 stop29h 10m

Portland

Mon 9/8

6:05 am-9:07 am

1 stop25h 02m

$277

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Fri 10/10

6:59 pm-10:39 am

2 stops17h 40m

Eugene

Tue 10/14

6:15 am-5:57 pm

2 stops9h 42m

$278

St. LouisMedford

STL - MFR

STLMFR

Lambert-St Louis

Tue 8/26

3:35 pm-12:08 am

1 stop10h 33m

Medford

Tue 9/2

12:02 pm-2:39 pm

1 stop24h 37m

$279

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 8/21

7:11 pm-11:59 pm

1 stop5h 48m

Boise Air Term. Gowen Fld

Tue 8/26

5:45 am-5:47 pm

2 stops11h 02m

$280

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 9/3

5:55 am-2:33 pm

1 stop10h 38m

Portland

Sat 9/6

6:07 am-3:24 pm

1 stop7h 17m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 56 results
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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 $368). 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 June 12, 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 June 12, 2025.
Read through reviews of airlines operating flights from St. Louis to Oregon, such as Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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 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 American Airlines, with whom users have recently found tickets for as low as $139. However, be on the lookout for offers from Alaska Airlines and Sun Country Air, 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 - Eugene or Lambert-St Louis - Boise Air Term. Gowen Fld, Lambert-St Louis - Portland is the most popular route from St. Louis to Oregon.

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

    Looking for the cheapest flight from St. Louis to Oregon? While on average our users pay $545, our data indicates the cheapest price to be $398. The most popular route (Lambert-St Louis - Portland), is priced around $296.

  • 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 $368). 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

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Alternative routes for St. Louis to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from St. Louis to Oregon

Discover the top 6 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$187FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$170Average$485FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$215Average$486FlexibilityNo cancel feeOn-time75%
DeltaCheapest$216Average$491FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$226Average$439FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$226Average$500FlexibilityNo cancel feeOn-time69%

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