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$98+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PDX
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$227
(United Airlines)

One-way from

$98
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$346
Provider with most accurate pricing for Lambert-St Louis-Portland flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Portland flights.
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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. 7% potential increase in price ($28 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 April 2025
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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 April 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 7/85:15 amSTL - PDX
1 stop6h 17mUnited Airlines
Sat 7/1911:59 pmPDX - STL
1 stop7h 32mUnited Airlines
Deal found 4/29$227
This CheapOair deal was found by Cheapflights users on 4/28. 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 5/218:15 pmSTL - BOI
1 stop16h 36mFrontier
Sun 5/2512:36 pmBOI - STL
1 stop19h 33mFrontier
Deal found 4/28$227
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/49:55 pmSTL - PDX
1 stop19h 47mFrontier
Tue 5/66:20 amPDX - STL
1 stop25h 39mFrontier
Deal found 4/29$228
This Southwest deal was found by Cheapflights users on 4/29. 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 9/21:20 pmSTL - PDX
1 stop9h 55mSouthwest
Tue 9/96:40 amPDX - STL
1 stop8h 15mSouthwest
Deal found 4/29$232
This Delta deal was found by Cheapflights users on 4/29. 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 6/37:19 pmSTL - PDX
1 stop6h 24mDelta
Tue 6/1011:13 pmPDX - STL
1 stop8h 24mDelta
Deal found 4/29$263
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 5/275:00 amSTL - PDX
1 stop7h 24mAmerican Airlines
Tue 6/311:59 pmPDX - STL
1 stop7h 55mAmerican Airlines
Deal found 4/29$267
This Delta deal was found by Cheapflights users on 4/29. 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 5/287:30 amSTL - RDM
2 stops13h 19mDelta
Sat 6/77:29 pmRDM - STL
2 stops13h 03mDelta
Deal found 4/29$286
This Hawaiian Airlines deal was found by Cheapflights users on 4/28. 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 4/28$286
This Delta deal was found by Cheapflights users on 4/28. 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 - BOI
1 stop7h 17mDelta
Thu 5/2911:59 pmBOI - STL
1 stop8h 01mDelta
Deal found 4/28$287
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/131:41 pmSTL - BOI
1 stop5h 19mUnited Airlines
Sat 5/1711:02 amBOI - STL
2 stops8h 59mUnited Airlines
Deal found 4/28$292
This Delta deal was found by Cheapflights users on 4/28. 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 5/207:30 amSTL - EUG
2 stops11h 13mDelta
Sat 5/247:00 amEUG - STL
2 stops12h 32mDelta
Deal found 4/28$306
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/237:24 pmSTL - PDX
1 stop6h 53mMultiple Airlines
Tue 5/274:00 pmPDX - STL
1 stop6h 04mMultiple Airlines
Deal found 4/29$308

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 April 30, 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

Tue 7/8

5:15 am-9:32 am

1 stop6h 17m

Portland

Sat 7/19

11:59 pm-9:31 am

1 stop7h 32m

$227

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/21

8:15 pm-11:51 am

1 stop16h 36m

Boise Air Term. Gowen Fld

Sun 5/25

12:36 pm-9:09 am

1 stop19h 33m

$227

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 5/4

9:55 pm-3:42 pm

1 stop19h 47m

Portland

Tue 5/6

6:20 am-9:59 am

1 stop25h 39m

$228

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 6/3

7:19 pm-11:43 pm

1 stop6h 24m

Portland

Tue 6/10

11:13 pm-9:37 am

1 stop8h 24m

$263

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 5/27

5:00 am-10:24 am

1 stop7h 24m

Portland

Tue 6/3

11:59 pm-9:54 am

1 stop7h 55m

$267

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 9/13

3:35 pm-10:40 pm

1 stop8h 05m

Boise Air Term. Gowen Fld

Sat 9/20

6:35 am-2:39 pm

1 stop7h 04m

$286

St. LouisRedmond

STL - RDM

STLRDM

Lambert-St Louis

Wed 5/28

7:30 am-6:49 pm

2 stops13h 19m

Bend/Redmond

Sat 6/7

7:29 pm-10:32 am

2 stops13h 03m

$286

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 5/28

6:05 pm-12:22 am

1 stop7h 17m

Boise Air Term. Gowen Fld

Thu 5/29

11:59 pm-9:00 am

1 stop8h 01m

$287

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 5/13

1:41 pm-6:00 pm

1 stop5h 19m

Boise Air Term. Gowen Fld

Sat 5/17

11:02 am-9:01 pm

2 stops8h 59m

$292

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Tue 5/20

7:30 am-4:43 pm

2 stops11h 13m

Eugene

Sat 5/24

7:00 am-9:32 pm

2 stops12h 32m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 April 30, 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 April 30, 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
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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
2,402 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

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 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 Frontier, with whom users have recently found tickets for as low as $98. However, be on the lookout for offers from American Airlines and Southwest, 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.

  • 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 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$94Average$180FlexibilityNo cancel feeOn-time65%
FrontierCheapest$108Average$190FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$171Average$491FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$215Average$499FlexibilityNo cancel feeOn-time75%
DeltaCheapest$216Average$494FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$226Average$443FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$233Average$514FlexibilityNo cancel feeOn-time69%

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