What is the cheapest airline that flies from Lambert-St Louis to Oregon?

Frontier, Southwest, and Delta are the most popular carriers operating from Lambert-St Louis to Oregon

What airlines fly to Oregon?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Oregon from St. Louis according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Oregon. Keep in mind that there are 6 different airlines that fly to Oregon on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Oregon on average per week?

As of September 2026, 6 flights take off from St. Louis and land in Oregon each week. The most common flight departure day for this route is Thu, with 33% of weekly flights taking off on this day.

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?

There are 6 operators available for flights from Lambert-St Louis Airport to Oregon as of September 2026.

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.

$132 Cheap Flights from St. Louis to Oregon in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Oregon

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:42 pm - 10:54 amSTL Lambert-St Louis-PDX Portland

17h 12m1 stop Denver Intl

12:02 pm - 3:23 pmPDX Portland-STL Lambert-St Louis

25h 21m1 stop Denver Intl

$235Frontier

Sat, Oct 24 - Tue, Oct 27

7:42 pm - 10:54 amSTL Lambert-St Louis-PDX Portland

17h 12m1 stop Denver Intl

12:02 pm - 7:14 pmPDX Portland-STL Lambert-St Louis

29h 12m1 stop Denver Intl

$254Frontier

Sat, Oct 24 - Thu, Oct 29

2:22 pm - 10:08 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

8h 46m2 stops Salt Lake City Seattle/Tacoma Intl

12:08 pm - 11:21 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

10h 13m2 stops Seattle/Tacoma Intl Minneapolis St Paul

$313Delta

Wed, Oct 21 - Wed, Oct 28

2:20 pm - 10:57 pmSTL Lambert-St Louis-RDM Bend/Redmond

10h 37m2 stops Salt Lake City Seattle/Tacoma Intl

7:27 pm - 9:25 amRDM Bend/Redmond-STL Lambert-St Louis

11h 58m2 stops Seattle/Tacoma Intl Detroit Metropolitan Wayne County

$313Delta

Wed, Nov 11 - Sat, Nov 14

7:08 am - 12:58 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

6h 50m1 stop San Francisco

5:30 pm - 11:44 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

5h 14m1 stop Denver Intl

$364United Airlines

Tue, Oct 6 - Tue, Oct 6

5:05 am - 9:50 amSTL Lambert-St Louis-PDX Portland

6h 45m1 stop Phoenix Sky Harbor Intl

3:15 pm - 11:40 pmPDX Portland-STL Lambert-St Louis

6h 25m1 stop Phoenix Sky Harbor Intl

$364Southwest

Mon, Oct 19 - Sat, Oct 24

5:05 am - 9:50 amSTL Lambert-St Louis-PDX Portland

6h 45m1 stop Phoenix Sky Harbor Intl

1:25 pm - 10:20 pmPDX Portland-STL Lambert-St Louis

6h 55m1 stop Las Vegas Harry Reid Intl

$364Southwest

Thu, Oct 29 - Mon, Nov 2

4:49 pm - 9:10 pmSTL Lambert-St Louis-PDX Portland

6h 21m1 stop Denver Intl

10:43 am - 7:41 pmPDX Portland-STL Lambert-St Louis

6h 58m1 stop Chicago O'Hare Intl

$369United Airlines

Sat, Oct 17 - Sat, Oct 24

5:40 am - 11:24 amSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

6h 44m1 stop Dallas/Fort Worth

2:41 pm - 9:59 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

6h 18m1 stop Dallas/Fort Worth

$369American Airlines

Tue, Oct 13 - Wed, Oct 14

8:03 am - 1:39 pmSTL Lambert-St Louis-PDX Portland

7h 36m1 stop Phoenix Sky Harbor Intl

6:01 am - 4:51 pmPDX Portland-STL Lambert-St Louis

8h 50m1 stop Chicago O'Hare Intl

$369American Airlines

Wed, Oct 21 - Sat, Oct 24

Cheap last minute flights

Enter your travel dates to find the best prices.

12:17 pm - 1:55 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

26h 38m1 stop Las Vegas Harry Reid Intl

2:50 pm - 11:32 amBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

19h 42m1 stop Las Vegas Harry Reid Intl

$370Frontier

Sat, Sep 12 - Mon, Sep 14

12:17 pm - 11:36 amSTL Lambert-St Louis-PDX Portland

25h 19m1 stop Las Vegas Harry Reid Intl

12:24 pm - 11:17 amPDX Portland-STL Lambert-St Louis

20h 53m1 stop Las Vegas Harry Reid Intl

$400Frontier

Sat, Sep 12 - Sat, Sep 19

5:43 am - 1:17 pmSTL Lambert-St Louis-PDX Portland

9h 34m1 stop Dallas/Fort Worth

6:00 am - 4:40 pmPDX Portland-STL Lambert-St Louis

8h 40m1 stop Dallas/Fort Worth

$451American Airlines

Sat, Sep 12 - Sat, Sep 19

8:00 am - 1:35 pmSTL Lambert-St Louis-PDX Portland

7h 35m1 stop Phoenix Sky Harbor Intl

7:00 am - 6:04 pmPDX Portland-STL Lambert-St Louis

9h 04m1 stop Dallas/Fort Worth

$451American Airlines

Thu, Sep 17 - Mon, Sep 21

7:05 am - 11:20 amSTL Lambert-St Louis-PDX Portland

6h 15m1 stop Dallas Love Field

11:35 am - 9:15 pmPDX Portland-STL Lambert-St Louis

7h 40m2 stops Sacramento Intl Denver Intl

$535Southwest

Wed, Sep 16 - Wed, Sep 23

12:20 pm - 7:55 pmSTL Lambert-St Louis-PDX Portland

9h 35m2 stops Denver Intl Oakland

11:35 am - 9:15 pmPDX Portland-STL Lambert-St Louis

7h 40m2 stops Sacramento Intl Denver Intl

$540Southwest

Wed, Sep 16 - Wed, Sep 23

6:08 pm - 10:41 pmSTL Lambert-St Louis-EUG Eugene

6h 33m1 stop Portland

6:05 am - 2:21 pmEUG Eugene-STL Lambert-St Louis

6h 16m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Wed, Sep 16 - Sat, Sep 19

8:00 am - 11:52 amSTL Lambert-St Louis-EUG Eugene

5h 52m1 stop Salt Lake City

1:38 pm - 11:16 pmEUG Eugene-STL Lambert-St Louis

7h 38m2 stops Salt Lake City Minneapolis St Paul

$572Delta

Wed, Sep 16 - Sat, Sep 19

8:46 am - 5:11 pmSTL Lambert-St Louis-EUG Eugene

10h 25m2 stops Minneapolis St Paul Seattle/Tacoma Intl

1:38 pm - 11:16 pmEUG Eugene-STL Lambert-St Louis

7h 38m2 stops Salt Lake City Minneapolis St Paul

$577Delta

Wed, Sep 16 - Sat, Sep 19

6:08 pm - 8:20 pmSTL Lambert-St Louis-PDX Portland

4h 12mnonstop

11:16 am - 5:10 pmPDX Portland-STL Lambert-St Louis

3h 54mnonstop

$687Alaska Airlines

Thu, Sep 17 - Mon, Sep 21

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Alaska Airlines flights from St. Louis to Oregon

Our best Alaska Airlines deals on St. Louis to Oregon flight tickets

Alaska Airlines

Sep 23

STL6:08 pmLambert-St Louis

6h 33m

1 stop

EUG10:41 pmEugene

Sep 26

EUG3:08 pmEugene

21h 13m

1 stop

STL2:21 pmLambert-St Louis

$379

Alaska Airlines

Sep 23

STL6:08 pmLambert-St Louis

6h 33m

1 stop

EUG10:41 pmEugene

Sep 28

EUG3:08 pmEugene

6h 51m

1 stop

STL11:59 pmLambert-St Louis

$406

Alaska Airlines

Feb 19

STL7:00 amLambert-St Louis

7h 37m

1 stop

EUG12:37 pmEugene

Feb 22

EUG1:30 pmEugene

8h 14m

1 stop

STL11:44 pmLambert-St Louis

$432

Southwest flights from St. Louis to Oregon

Our best Southwest deals on St. Louis to Oregon flight tickets

Southwest

Oct 19

STL5:05 amLambert-St Louis

6h 45m

1 stop

PDX9:50 amPortland

Oct 24

PDX3:15 pmPortland

6h 25m

1 stop

STL11:40 pmLambert-St Louis

$364

Southwest

Sep 30

STL12:20 pmLambert-St Louis

9h 35m

2 stops

PDX7:55 pmPortland

Oct 14

PDX4:05 pmPortland

5h 50m

1 stop

STL11:55 pmLambert-St Louis

$374

Southwest

Oct 19

STL5:10 amLambert-St Louis

9h 25m

2 stops

PDX12:35 pmPortland

Oct 24

PDX7:00 amPortland

9h 25m

2 stops

STL6:25 pmLambert-St Louis

$379

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Sat 10/24

7:42 pm-10:54 am

1 stop17h 12m

Portland

Tue 10/27

12:02 pm-3:23 pm

1 stop25h 21m

$235

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Sat 10/24

7:42 pm-10:54 am

1 stop17h 12m

Portland

Thu 10/29

12:02 pm-7:14 pm

1 stop29h 12m

$254

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Wed 10/21

2:22 pm-10:08 pm

2 stops8h 46m

Boise Air Term. Gowen Fld

Wed 10/28

12:08 pm-11:21 pm

2 stops10h 13m

$313

St. LouisRedmond

STL Lambert-St Louis - RDM Bend/Redmond

STLRDM

Lambert-St Louis

Wed 11/11

2:20 pm-10:57 pm

2 stops10h 37m

Bend/Redmond

Sat 11/14

7:27 pm-9:25 am

2 stops11h 58m

$313

Quickest round-trip

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Tue 10/6

7:08 am-12:58 pm

1 stop6h 50m

Boise Air Term. Gowen Fld

Tue 10/6

5:30 pm-11:44 pm

1 stop5h 14m

$364

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Mon 10/19

5:05 am-9:50 am

1 stop6h 45m

Portland

Sat 10/24

3:15 pm-11:40 pm

1 stop6h 25m

$364

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Thu 10/29

5:05 am-9:50 am

1 stop6h 45m

Portland

Mon 11/2

1:25 pm-10:20 pm

1 stop6h 55m

$364

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Sat 10/17

4:49 pm-9:10 pm

1 stop6h 21m

Portland

Sat 10/24

10:43 am-7:41 pm

1 stop6h 58m

$369

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Tue 10/13

5:40 am-11:24 am

1 stop6h 44m

Boise Air Term. Gowen Fld

Wed 10/14

2:41 pm-9:59 pm

1 stop6h 18m

$369

St. LouisPortland

STL Lambert-St Louis - PDX Portland

STLPDX

Lambert-St Louis

Wed 10/21

8:03 am-1:39 pm

1 stop7h 36m

Portland

Sat 10/24

6:01 am-4:51 pm

1 stop8h 50m

$369

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $342. The month of September is another great option to travel to Oregon, with average flight prices from St. Louis averaging around $350.

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 $394. 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 $484.

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 $279. 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 in the afternoon, with an average ticket price of $442. Departure times in the afternoon 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 from St. Louis 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 $372 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 $283 on momondo.

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

There are 3 cabin classes available to choose from on 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.

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	$132
Fastest flight time	4h 12m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Oregon	64 airports

The best one-way flight to Oregon from St. Louis in the past 72 hours is $132. The best round-trip flight deal from St. Louis to Oregon found on momondo in the last 72 hours is $235.

The fastest flight from St. Louis to Oregon takes 4h 12m

Direct flights go from St. Louis to Oregon on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. The only airline offering direct flights is Alaska Airlines.

There are 64 airports in Oregon. From St. Louis there are direct flights to Portland (PDX).

Search flight deals

Frequently asked questions about flying from St. Louis to Oregon

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?
There are 6 operators available for flights from Lambert-St Louis Airport to Oregon as of September 2026.
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?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Oregon is Boeing 737 MAX 8, representing 32.14% of all bookings. The subsequent popular models are Boeing 737 MAX 9 at 23.21%, Boeing 737 at 17.86%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 14.29%.

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
American Airlines	PriceFrom $188	Free Cancellation	Rating 7.1 12,049 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $199	Free Cancellation	Rating 7.9 12,909 reviews	Search Alaska Airlines flights
Delta	PriceFrom $209	Free Cancellation	Rating 7.8 8,558 reviews	Search Delta flights
Frontier	PriceFrom $216	Free Cancellation	Rating 5.6 2,608 reviews	Search Frontier flights
Southwest	PriceFrom $248	Free Cancellation	Rating 8.0 4,194 reviews	Search Southwest flights
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 10,202 reviews	Search United 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.