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Cheap flights from St. Louis to Oregon from $66

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 5/9. 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
8:12 pm - 11:57 am
STL
-
PDX
17h 45m
2 stops
Frontier Logo
11:48 am - 7:12 pm
PDX
-
STL
29h 24m
1 stop
$202Frontier
Sat, Apr 18 - Thu, Apr 23
Frontier Logo
8:12 pm - 11:03 am
STL
-
PDX
16h 51m
1 stop
Frontier Logo
11:48 am - 11:19 pm
PDX
-
STL
33h 31m
2 stops
$207Frontier
Thu, Apr 16 - Mon, Apr 20
Alaska Airlines Logo
6:20 pm - 8:37 pm
STL
-
PDX
4h 17mnonstop
Alaska Airlines Logo
11:18 am - 5:06 pm
PDX
-
STL
3h 48mnonstop
$229Alaska Airlines
Wed, May 13 - Mon, May 18
Multiple Airlines Logo
8:12 pm - 11:03 am
STL
-
PDX
16h 51m
1 stop
Multiple Airlines Logo
11:18 am - 5:06 pm
PDX
-
STL
3h 48mnonstop
$236Multiple Airlines
Sun, May 17 - Sat, May 23
Alaska Airlines Logo
7:56 pm - 12:11 am
STL
-
PDX
6h 15m
1 stop
Alaska Airlines Logo
11:18 am - 5:06 pm
PDX
-
STL
3h 48mnonstop
$239Alaska Airlines
Fri, May 15 - Fri, May 22
United Airlines Logo
5:59 pm - 10:54 pm
STL
-
PDX
6h 55m
1 stop
United Airlines Logo
7:45 pm - 5:47 am
PDX
-
STL
8h 02m
1 stop
$244United Airlines
Wed, May 13 - Mon, May 18
Delta Logo
6:12 pm - 10:46 pm
STL
-
EUG
6h 34m
1 stop
Delta Logo
12:40 pm - 9:31 pm
EUG
-
STL
6h 51m
1 stop
$277Delta
Tue, Mar 10 - Sat, Mar 14
Delta Logo
7:00 am - 10:55 pm
STL
-
EUG
17h 55m
2 stops
Delta Logo
12:40 pm - 9:31 pm
EUG
-
STL
6h 51m
1 stop
$281Delta
Thu, Mar 5 - Sat, Mar 14
United Airlines Logo
5:15 am - 12:15 pm
STL
-
EUG
9h 00m
2 stops
United Airlines Logo
6:00 am - 8:41 pm
EUG
-
STL
12h 41m
2 stops
$288United Airlines
Tue, Mar 10 - Wed, Mar 11
Multiple Airlines Logo
4:51 pm - 10:34 am
STL
-
MFR
19h 43m
2 stops
Multiple Airlines Logo
5:11 pm - 9:13 pm
MFR
-
STL
26h 02m
1 stop
$362Multiple Airlines
Wed, Feb 25 - Sun, Mar 1

Frontier flights from St. Louis to Oregon

Our best Frontier deals on St. Louis to Oregon flight tickets
Frontier
Apr 18
STL8:12 pmLambert-St Louis
17h 45m
2 stops
PDX11:57 amPortland
Apr 23
PDX11:48 amPortland
29h 24m
1 stop
STL7:12 pmLambert-St Louis
$202
Frontier
Apr 16
STL8:12 pmLambert-St Louis
16h 51m
1 stop
PDX11:03 amPortland
Apr 20
PDX11:48 amPortland
33h 31m
2 stops
STL11:19 pmLambert-St Louis
$207
Frontier
Apr 18
STL8:12 pmLambert-St Louis
16h 51m
1 stop
PDX11:03 amPortland
Apr 23
PDX11:48 amPortland
29h 24m
1 stop
STL7:12 pmLambert-St Louis
$212

Alaska Airlines flights from St. Louis to Oregon

Our best Alaska Airlines deals on St. Louis to Oregon flight tickets
Alaska Airlines
May 13
STL6:20 pmLambert-St Louis
4h 17m
PDX8:37 pmPortland
May 18
PDX11:18 amPortland
3h 48m
STL5:06 pmLambert-St Louis
$229
Alaska Airlines
May 15
STL7:56 pmLambert-St Louis
6h 15m
1 stop
PDX12:11 amPortland
May 22
PDX11:18 amPortland
3h 48m
STL5:06 pmLambert-St Louis
$239
Alaska Airlines
May 15
STL7:56 pmLambert-St Louis
6h 15m
1 stop
PDX12:11 amPortland
May 22
PDX12:00 pmPortland
9h 57m
1 stop
STL11:57 pmLambert-St Louis
$249

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 February 13, 2026.
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

Sat 4/18

8:12 pm-11:57 am

2 stops17h 45m

Portland

Thu 4/23

11:48 am-7:12 pm

1 stop29h 24m

$202

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 4/16

8:12 pm-11:03 am

1 stop16h 51m

Portland

Mon 4/20

11:48 am-11:19 pm

2 stops33h 31m

$207

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

6:20 pm-8:37 pm

Nonstop4h 17m

Portland

Mon 5/18

11:18 am-5:06 pm

Nonstop3h 48m

$229

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 5/17

8:12 pm-11:03 am

1 stop16h 51m

Portland

Sat 5/23

11:18 am-5:06 pm

Nonstop3h 48m

$236

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 5/15

7:56 pm-12:11 am

1 stop6h 15m

Portland

Fri 5/22

11:18 am-5:06 pm

Nonstop3h 48m

$239

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

5:59 pm-10:54 pm

1 stop6h 55m

Portland

Mon 5/18

7:45 pm-5:47 am

1 stop8h 02m

$244

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Tue 3/10

6:12 pm-10:46 pm

1 stop6h 34m

Eugene

Sat 3/14

12:40 pm-9:31 pm

1 stop6h 51m

$277

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Thu 3/5

7:00 am-10:55 pm

2 stops17h 55m

Eugene

Sat 3/14

12:40 pm-9:31 pm

1 stop6h 51m

$281

St. LouisEugene

STL - EUG

STLEUG

Lambert-St Louis

Tue 3/10

5:15 am-12:15 pm

2 stops9h 00m

Eugene

Wed 3/11

6:00 am-8:41 pm

2 stops12h 41m

$288

St. LouisMedford

STL - MFR

STLMFR

Lambert-St Louis

Wed 2/25

4:51 pm-10:34 am

2 stops19h 43m

Medford

Sun 3/1

5:11 pm-9:13 pm

1 stop26h 02m

$362

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 January is, on average, the cheapest month to fly to Oregon from St. Louis, with most prices found around $291. The month of September is another great option to travel to Oregon, with average flight prices from St. Louis averaging around $302.

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 $278. 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 $545.

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 afternoon. momondo users have found flights departing from St. Louis to Oregon in the afternoon for as low as $379. 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 $282 on momondo.

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

There are 2 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 22% 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

$134

Fastest flight time

4h 10m

Direct flights

Every day

Airports in Oregon

64 airports
The best one-way flight to Oregon from St. Louis in the past 72 hours is $134. The best round-trip flight deal from St. Louis to Oregon found on momondo in the last 72 hours is $278.
The fastest flight from St. Louis to Oregon takes 4h 10m
Direct flights go from St. Louis to Oregon every day.
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 $141Free CancellationRating
5.7
3,053 reviews
Search Frontier flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,193 reviews
Search Delta flights
American AirlinesPriceFrom $188Free CancellationRating
7.2
11,277 reviews
Search American Airlines flights
SouthwestPriceFrom $204Free CancellationRating
8.0
4,283 reviews
Search Southwest flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
9,285 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $248Free CancellationRating
8.0
11,878 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $338Free CancellationRating
7.8
2,833 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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