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Cheap flights from St. Louis to Oregon from $108

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Oregon departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Oregon

Cheap round-trip flights

Alaska Airlines Logo
6:30 pm - 12:15 amSTL-PDX
7h 45m1 stop
Alaska Airlines Logo
6:05 am - 2:39 pmPDX-STL
6h 34m1 stop
$228Alaska Airlines
Find Deal
Fri, Sep 19 - Tue, Sep 30
Delta Logo
7:11 pm - 11:49 pmSTL-PDX
6h 38m1 stop
Delta Logo
5:05 pm - 12:38 amPDX-STL
5h 33m1 stop
$229Delta
Find Deal
Wed, Aug 20 - Sat, Aug 23
Southwest Logo
3:00 pm - 8:30 pmSTL-PDX
7h 30m1 stop
Southwest Logo
9:05 pm - 11:30 amPDX-STL
12h 25m2 stops
$234Southwest
Find Deal
Tue, Sep 9 - Fri, Sep 12
Frontier Logo
7:55 pm - 11:37 amSTL-BOI
16h 42m1 stop
Frontier Logo
12:22 pm - 9:06 amBOI-STL
19h 44m1 stop
$235Frontier
Find Deal
Wed, Sep 17 - Sun, Sep 21
Frontier Logo
7:54 pm - 11:23 amSTL-PDX
17h 29m1 stop
Frontier Logo
6:51 am - 9:11 amPDX-STL
24h 20m1 stop
$245Frontier
Find Deal
Sat, Aug 23 - Tue, Aug 26
Southwest Logo
12:10 pm - 7:40 pmSTL-PDX
9h 30m2 stops
Southwest Logo
10:50 am - 8:25 pmPDX-STL
7h 35m1 stop
$259Southwest
Find Deal
Fri, Sep 12 - Mon, Sep 15
United Airlines Logo
5:15 am - 9:28 amSTL-PDX
6h 13m1 stop
United Airlines Logo
7:45 am - 4:53 pmPDX-STL
7h 08m1 stop
$319United Airlines
Find Deal
Sun, Aug 24 - Wed, Aug 27
United Airlines Logo
5:49 pm - 12:38 amSTL-PDX
8h 49m1 stop
United Airlines Logo
5:00 am - 3:44 pmPDX-STL
8h 44m2 stops
$324United Airlines
Find Deal
Fri, Aug 22 - Sat, Aug 23
American Airlines Logo
7:53 am - 1:10 pmSTL-MFR
7h 17m1 stop
American Airlines Logo
1:52 pm - 12:16 amMFR-STL
8h 24m1 stop
$368American Airlines
Find Deal
Wed, Aug 13 - Wed, Aug 20
American Airlines Logo
6:00 am - 12:29 pmSTL-BOI
7h 29m1 stop
American Airlines Logo
5:15 pm - 12:16 amBOI-STL
6h 01m1 stop
$393American Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 19

Frontier flights from St. Louis to Oregon

Our best Frontier deals on St. Louis to Oregon flight tickets
Frontier
Sep 17
STL7:55 pmLambert-St Louis
16h 42m
1 stop
BOI11:37 amBoise Air Term. Gowen Fld
Sep 21
BOI12:22 pmBoise Air Term. Gowen Fld
19h 44m
1 stop
STL9:06 amLambert-St Louis
$235
Find similar
Frontier
Aug 6
STL7:29 pmLambert-St Louis
17h 17m
1 stop
BOI11:46 amBoise Air Term. Gowen Fld
Aug 10
BOI12:36 pmBoise Air Term. Gowen Fld
19h 35m
1 stop
STL9:11 amLambert-St Louis
$237
Find similar
Frontier
Aug 23
STL7:54 pmLambert-St Louis
17h 29m
1 stop
PDX11:23 amPortland
Aug 26
PDX6:51 amPortland
24h 20m
1 stop
STL9:11 amLambert-St Louis
$245
Find similar

Delta flights from St. Louis to Oregon

Our best Delta deals on St. Louis to Oregon flight tickets
Delta
Aug 20
STL7:11 pmLambert-St Louis
6h 38m
1 stop
PDX11:49 pmPortland
Aug 23
PDX5:05 pmPortland
5h 33m
1 stop
STL12:38 amLambert-St Louis
$229
Find similar
Delta
Oct 7
STL7:30 pmLambert-St Louis
6h 13m
1 stop
PDX11:43 pmPortland
Oct 18
PDX5:50 pmPortland
13h 01m
2 stops
STL8:51 amLambert-St Louis
$251
Find similar
Delta
Aug 21
STL2:15 pmLambert-St Louis
9h 32m
1 stop
PDX9:47 pmPortland
Aug 23
PDX5:05 pmPortland
5h 33m
1 stop
STL12:38 amLambert-St Louis
$254
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from St. Louis to Oregon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 9/19

6:30 pm-12:15 am

1 stop7h 45m

Portland

Tue 9/30

6:05 am-2:39 pm

1 stop6h 34m

$228

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 8/20

7:11 pm-11:49 pm

1 stop6h 38m

Portland

Sat 8/23

5:05 pm-12:38 am

1 stop5h 33m

$229

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 9/9

3:00 pm-8:30 pm

1 stop7h 30m

Portland

Fri 9/12

9:05 pm-11:30 am

2 stops12h 25m

$234

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 9/17

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

Sun 9/21

12:22 pm-9:06 am

1 stop19h 44m

$235

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 8/23

7:54 pm-11:23 am

1 stop17h 29m

Portland

Tue 8/26

6:51 am-9:11 am

1 stop24h 20m

$245

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 9/12

12:10 pm-7:40 pm

2 stops9h 30m

Portland

Mon 9/15

10:50 am-8:25 pm

1 stop7h 35m

$259

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 8/24

5:15 am-9:28 am

1 stop6h 13m

Portland

Wed 8/27

7:45 am-4:53 pm

1 stop7h 08m

$319

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 8/22

5:49 pm-12:38 am

1 stop8h 49m

Portland

Sat 8/23

5:00 am-3:44 pm

2 stops8h 44m

$324

St. LouisMedford

STL - MFR

STLMFR

Lambert-St Louis

Wed 8/13

7:53 am-1:10 pm

1 stop7h 17m

Medford

Wed 8/20

1:52 pm-12:16 am

1 stop8h 24m

$368

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 8/15

6:00 am-12:29 pm

1 stop7h 29m

Boise Air Term. Gowen Fld

Tue 8/19

5:15 pm-12:16 am

1 stop6h 01m

$393

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Oregon from

How to get the cheapest flight ticket from St. Louis to Oregon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Oregon?

The month of September is, on average, the cheapest month to fly to Oregon from St. Louis, with most prices found around $306. The month of April is another great option to travel to Oregon, with average flight prices from St. Louis averaging around $316.

What is the cheapest day to depart on your flight to Oregon?

On average, the least expensive day to fly to Oregon from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $324. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Oregon is Saturday, with ticket prices averaging around $562.

What is the cheapest time of day to depart on your flight to Oregon?

According to our data, the cheapest time of day to fly to Oregon is in the morning. momondo users have found flights departing from St. Louis to Oregon in the morning for as low as $394. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Oregon are more costly at noon, with an average ticket price of $562. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Oregon flight route?

Fly from Lambert-St Louis to Portland for the best Lambert-St Louis - Oregon flight prices

How far in advance should I book a flight to Oregon?

You are more likely to see cheaper flights to Oregon from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Oregon for around $356 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Oregon from St. Louis for as low as $291 on momondo.

What cabin class options are available on Lambert-St Louis to Oregon flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Oregon flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Oregon flights?

You could potentially save up to 37% on your flight if you consider stops on a St. Louis to Oregon flight.

Cheap St. Louis to Oregon flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Oregon

Best Price Found

$108

Fastest flight time

4h 05m

Direct flights

Mon and Sun

Airports in Oregon

5 airports
The best one-way flight to Oregon from St. Louis in the past 72 hours is $108. The best round-trip flight deal from St. Louis to Oregon found on momondo in the last 72 hours is $228.
The fastest flight from St. Louis to Oregon takes 4h 05m
Direct flights go from St. Louis to Oregon on Monday and Sunday. The only airline offering direct flights is Southwest.
There are 5 airports near Oregon: Portland (PDX), Eugene (EUG), Medford (MFR), Bend/Redmond (RDM), Boise Air Term. Gowen Fld (BOI)
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Oregon?

    Prices for flights from Lambert-St Louis Airport to Oregon refresh daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Oregon?

  • How old do you have to be to fly from Lambert-St Louis Airport to Oregon?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Oregon.

  • What documentation or ID do you need to fly to Oregon?

    The travel and health documents you'll need for your trip to Oregon may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Oregon. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Oregon?

Best airlines flying from St. Louis to Oregon

Compare and see reviews for airlines that fly from St. Louis to Oregon with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $108Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
DeltaPriceFrom $168Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Alaska AirlinesPriceFrom $225Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $226Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $226Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $338Free CancellationRating
7.8
2,611 reviews
Search Hawaiian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Oregon?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Oregon for you.

Can I find flights from St. Louis to Oregon with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Oregon flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Oregon?

Once you have performed a search for St. Louis to Oregon flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Oregon right now. Can momondo alert me if prices change?

Price alerts on flights to Oregon from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Oregon trip

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