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Cheap flights from St. Louis to Oregon from $79

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 11/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Oregon

Cheap round-trip flights

Frontier Logo
7:55 pm - 11:37 amSTL-BOI
16h 42m1 stop
Frontier Logo
12:22 pm - 9:06 amBOI-STL
19h 44m1 stop
$164Frontier
Find Deal
Wed, Oct 1 - Sun, Oct 5
Frontier Logo
7:52 pm - 11:48 amSTL-PDX
17h 56m1 stop
Frontier Logo
10:34 am - 9:07 amPDX-STL
20h 33m2 stops
$232Frontier
Find Deal
Fri, Oct 24 - Mon, Oct 27
United Airlines Logo
5:24 pm - 10:33 pmSTL-PDX
7h 09m1 stop
United Airlines Logo
5:00 am - 12:39 pmPDX-STL
5h 39m1 stop
$244United Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
Delta Logo
6:50 am - 12:20 pmSTL-PDX
7h 30m1 stop
Delta Logo
12:40 am - 8:51 amPDX-STL
6h 11m1 stop
$249Delta
Find Deal
Wed, Oct 22 - Sat, Oct 25
Southwest Logo
4:25 pm - 11:40 pmSTL-PDX
9h 15m2 stops
Southwest Logo
7:35 pm - 8:45 amPDX-STL
11h 10m1 stop
$260Southwest
Find Deal
Fri, Oct 24 - Mon, Oct 27
Delta Logo
2:15 pm - 11:57 pmSTL-PDX
11h 42m2 stops
Delta Logo
3:19 pm - 12:24 amPDX-STL
7h 05m2 stops
$268Delta
Find Deal
Tue, Oct 14 - Tue, Oct 21
United Airlines Logo
5:15 am - 1:43 pmSTL-BOI
9h 28m2 stops
United Airlines Logo
2:39 pm - 8:46 pmBOI-STL
5h 07m1 stop
$282United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 22
American Airlines Logo
6:00 am - 12:46 pmSTL-BOI
7h 46m1 stop
American Airlines Logo
1:26 pm - 8:26 pmBOI-STL
6h 00m1 stop
$287American Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
Southwest Logo
3:00 pm - 10:10 pmSTL-BOI
8h 10m1 stop
Southwest Logo
2:35 pm - 12:10 amBOI-STL
8h 35m2 stops
$292Southwest
Find Deal
Wed, Oct 8 - Tue, Oct 14
American Airlines Logo
5:11 am - 10:56 amSTL-PDX
7h 45m1 stop
American Airlines Logo
12:45 am - 10:39 amPDX-STL
8h 54m1 stop
$304American Airlines
Find Deal
Mon, Oct 27 - Sat, Nov 1

Alaska Airlines flights from St. Louis to Oregon

Our best Alaska Airlines deals on St. Louis to Oregon flight tickets
Alaska Airlines
Oct 7
STL6:33 amLambert-St Louis
7h 52m
1 stop
PDX12:25 pmPortland
Oct 7
PDX4:25 pmPortland
5h 38m
1 stop
STL12:03 amLambert-St Louis
$243
Find similar
Alaska Airlines
Jan 27
STL2:55 pmLambert-St Louis
8h 25m
1 stop
BOI10:20 pmBoise Air Term. Gowen Fld
Jan 31
BOI5:30 amBoise Air Term. Gowen Fld
7h 22m
1 stop
STL1:52 pmLambert-St Louis
$269
Find similar
Alaska Airlines
Dec 4
STL7:00 amLambert-St Louis
8h 55m
1 stop
PDX1:55 pmPortland
Dec 7
PDX2:30 pmPortland
7h 29m
1 stop
STL11:59 pmLambert-St Louis
$303
Find similar

Delta flights from St. Louis to Oregon

Our best Delta deals on St. Louis to Oregon flight tickets
Delta
Oct 22
STL6:50 amLambert-St Louis
7h 30m
1 stop
PDX12:20 pmPortland
Oct 25
PDX12:40 amPortland
6h 11m
1 stop
STL8:51 amLambert-St Louis
$249
Find similar
Delta
Oct 14
STL2:15 pmLambert-St Louis
11h 42m
2 stops
PDX11:57 pmPortland
Oct 21
PDX3:19 pmPortland
7h 05m
2 stops
STL12:24 amLambert-St Louis
$268
Find similar
Delta
Oct 7
STL3:30 pmLambert-St Louis
10h 27m
2 stops
PDX11:57 pmPortland
Oct 10
PDX5:00 pmPortland
5h 24m
1 stop
STL12:24 amLambert-St Louis
$272
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 September 18, 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. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 10/1

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

Sun 10/5

12:22 pm-9:06 am

1 stop19h 44m

$164

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 10/24

7:52 pm-11:48 am

1 stop17h 56m

Portland

Mon 10/27

10:34 am-9:07 am

2 stops20h 33m

$232

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 11/4

5:24 pm-10:33 pm

1 stop7h 09m

Portland

Tue 11/11

5:00 am-12:39 pm

1 stop5h 39m

$244

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 10/22

6:50 am-12:20 pm

1 stop7h 30m

Portland

Sat 10/25

12:40 am-8:51 am

1 stop6h 11m

$249

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 10/24

4:25 pm-11:40 pm

2 stops9h 15m

Portland

Mon 10/27

7:35 pm-8:45 am

1 stop11h 10m

$260

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 10/14

2:15 pm-11:57 pm

2 stops11h 42m

Portland

Tue 10/21

3:19 pm-12:24 am

2 stops7h 05m

$268

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 10/8

5:15 am-1:43 pm

2 stops9h 28m

Boise Air Term. Gowen Fld

Wed 10/22

2:39 pm-8:46 pm

1 stop5h 07m

$282

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 10/18

6:00 am-12:46 pm

1 stop7h 46m

Boise Air Term. Gowen Fld

Tue 10/21

1:26 pm-8:26 pm

1 stop6h 00m

$287

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 10/8

3:00 pm-10:10 pm

1 stop8h 10m

Boise Air Term. Gowen Fld

Tue 10/14

2:35 pm-12:10 am

2 stops8h 35m

$292

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 10/27

5:11 am-10:56 am

1 stop7h 45m

Portland

Sat 11/1

12:45 am-10:39 am

1 stop8h 54m

$304

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 April is, on average, the cheapest month to fly to Oregon from St. Louis, with most prices found around $316. The month of September 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 $358 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 $286 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 35% 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

Fastest flight time

4h 05m

Direct flights

Sun

Airports in Oregon

1 airport
The fastest flight from St. Louis to Oregon takes 4h 05m
Direct flights go from St. Louis to Oregon on Sunday. There are no airlines offering direct flights.
There is 1 airport near Oregon: 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 $108Free CancellationRating
5.8
3,171 reviews
Search Frontier flights
DeltaPriceFrom $168Free CancellationRating
7.9
7,964 reviews
Search Delta flights
American AirlinesPriceFrom $212Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $226Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $246Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $338Free CancellationRating
7.8
2,732 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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