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Cheap flights from St. Louis to Oregon from $63

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 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Oregon

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:16 pm - 4:31 pm
STL
-
PDX
20h 15m1 stop
Frontier Logo
11:59 am - 2:48 pm
PDX
-
STL
24h 49m1 stop
$205Frontier
Fri, Jan 9 - Fri, Jan 16
Alaska Airlines Logo
6:20 pm - 8:30 pm
STL
-
PDX
4h 10mnonstop
Alaska Airlines Logo
11:25 am - 5:13 pm
PDX
-
STL
3h 48mnonstop
$229Alaska Airlines
Wed, May 13 - Wed, May 20
American Airlines Logo
5:04 pm - 11:32 pm
STL
-
PDX
8h 28m1 stop
American Airlines Logo
10:15 pm - 9:40 am
PDX
-
STL
9h 25m1 stop
$249American Airlines
Thu, Jan 8 - Mon, Jan 12
Delta Logo
6:35 am - 6:50 pm
STL
-
PDX
14h 15m2 stops
Delta Logo
7:37 pm - 9:34 am
PDX
-
STL
11h 57m2 stops
$256Delta
Fri, Feb 6 - Mon, Feb 9
Delta Logo
7:00 am - 4:37 pm
STL
-
EUG
11h 37m2 stops
Delta Logo
11:30 am - 11:25 pm
EUG
-
STL
9h 55m2 stops
$256Delta
Thu, Jan 8 - Mon, Jan 26
Southwest Logo
2:20 pm - 9:15 pm
STL
-
EUG
8h 55m2 stops
Southwest Logo
2:45 pm - 11:35 pm
EUG
-
STL
6h 50m1 stop
$358Southwest
Tue, Mar 3 - Sun, Mar 8
American Airlines Logo
7:27 am - 1:07 pm
STL
-
MFR
7h 40m1 stop
American Airlines Logo
5:32 am - 1:53 pm
MFR
-
STL
6h 21m1 stop
$363American Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
11:20 am - 11:48 pm
STL
-
BOI
13h 28m2 stops
United Airlines Logo
2:37 pm - 8:58 pm
BOI
-
STL
5h 21m1 stop
$428United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
9:57 am - 7:45 pm
STL
-
BOI
10h 48m2 stops
United Airlines Logo
10:15 am - 10:58 pm
BOI
-
STL
11h 43m2 stops
$433United Airlines
Thu, Jan 8 - Mon, Jan 12
Southwest Logo
6:00 am - 2:05 pm
STL
-
BOI
9h 05m1 stop
Southwest Logo
5:00 am - 12:20 pm
BOI
-
STL
6h 20m1 stop
$511Southwest
Thu, Jan 1 - Sun, Jan 4

American Airlines flights from St. Louis to Oregon

Our best American Airlines deals on St. Louis to Oregon flight tickets
American Airlines
Jan 8
STL5:04 pmLambert-St Louis
8h 28m
1 stop
PDX11:32 pmPortland
Jan 12
PDX10:15 pmPortland
9h 25m
1 stop
STL9:40 amLambert-St Louis
$249
Find similar
American Airlines
Jan 15
STL3:37 pmLambert-St Louis
9h 55m
1 stop
PDX11:32 pmPortland
Jan 19
PDX11:59 pmPortland
9h 04m
1 stop
STL11:03 amLambert-St Louis
$324
Find similar
American Airlines
Jan 8
STL7:27 amLambert-St Louis
7h 40m
1 stop
MFR1:07 pmMedford
Jan 12
MFR5:32 amMedford
6h 21m
1 stop
STL1:53 pmLambert-St Louis
$363
Find similar

Delta flights from St. Louis to Oregon

Our best Delta deals on St. Louis to Oregon flight tickets
Delta
Feb 6
STL6:35 amLambert-St Louis
14h 15m
2 stops
PDX6:50 pmPortland
Feb 9
PDX7:37 pmPortland
11h 57m
2 stops
STL9:34 amLambert-St Louis
$256
Find similar
Delta
Jan 8
STL7:00 amLambert-St Louis
7h 32m
1 stop
PDX12:32 pmPortland
Jan 12
PDX1:30 pmPortland
7h 55m
2 stops
STL11:25 pmLambert-St Louis
$272
Find similar
Delta
May 20
STL6:59 pmLambert-St Louis
6h 42m
1 stop
PDX11:41 pmPortland
Jun 2
PDX12:40 amPortland
6h 00m
1 stop
STL8:40 amLambert-St Louis
$284
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 December 15, 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 1/9

10:16 pm-4:31 pm

1 stop20h 15m

Portland

Fri 1/16

11:59 am-2:48 pm

1 stop24h 49m

$205

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

6:20 pm-8:30 pm

Nonstop4h 10m

Portland

Wed 5/20

11:25 am-5:13 pm

Nonstop3h 48m

$229

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 1/8

5:04 pm-11:32 pm

1 stop8h 28m

Portland

Mon 1/12

10:15 pm-9:40 am

1 stop9h 25m

$249

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 2/6

6:35 am-6:50 pm

2 stops14h 15m

Portland

Mon 2/9

7:37 pm-9:34 am

2 stops11h 57m

$256

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Thu 1/8

7:00 am-4:37 pm

2 stops11h 37m

Eugene

Mon 1/26

11:30 am-11:25 pm

2 stops9h 55m

$256

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Tue 3/3

2:20 pm-9:15 pm

2 stops8h 55m

Eugene

Sun 3/8

2:45 pm-11:35 pm

1 stop6h 50m

$358

St. LouisMedford

STL - MFR

STLMFR

Lambert-St Louis

Thu 1/8

7:27 am-1:07 pm

1 stop7h 40m

Medford

Mon 1/12

5:32 am-1:53 pm

1 stop6h 21m

$363

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 1/8

11:20 am-11:48 pm

2 stops13h 28m

Boise Air Term. Gowen Fld

Mon 1/12

2:37 pm-8:58 pm

1 stop5h 21m

$428

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 1/8

9:57 am-7:45 pm

2 stops10h 48m

Boise Air Term. Gowen Fld

Mon 1/12

10:15 am-10:58 pm

2 stops11h 43m

$433

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 1/1

6:00 am-2:05 pm

1 stop9h 05m

Boise Air Term. Gowen Fld

Sun 1/4

5:00 am-12:20 pm

1 stop6h 20m

$511

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 $303. The month of February 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 Friday. momondo users have found tickets for Friday departures for as low as $283. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Oregon is Sunday, with ticket prices averaging around $585.

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 $359 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 $288 on momondo.

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

There is only 1 cabin class 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 29% 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

$270

Fastest flight time

4h 10m

Direct flights

Thu, Fri, Sat and Sun

Airports in Oregon

64 airports
The best flight deal from St. Louis to Oregon found on momondo in the last 72 hours is $270
The fastest flight from St. Louis to Oregon takes 4h 10m
Direct flights go from St. Louis to Oregon on Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 64 airports in Oregon. From St. Louis there are direct flights to Portland (PDX).
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 $137Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,010 reviews
Search Delta flights
American AirlinesPriceFrom $188Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
SouthwestPriceFrom $226Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
United AirlinesPriceFrom $231Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $248Free CancellationRating
8.0
11,456 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $338Free CancellationRating
7.8
2,819 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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