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Cheap flights from Oregon to St. Louis 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 Oregon to St. Louis departing on 10/20. 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 Oregon to St. Louis

Cheap round-trip flights

Frontier Logo
12:33 pm - 9:07 amBOI-STL
19h 34m1 stop
Frontier Logo
7:45 pm - 11:48 amSTL-BOI
17h 03m1 stop
$212Frontier
Find Deal
Thu, Nov 6 - Sat, Nov 8
Frontier Logo
12:43 pm - 9:07 amPDX-STL
18h 24m1 stop
Frontier Logo
7:52 pm - 10:58 amSTL-PDX
41h 06m2 stops
$241Frontier
Find Deal
Thu, Oct 23 - Sat, Oct 25
United Airlines Logo
8:30 am - 4:28 pmPDX-STL
5h 58m1 stop
United Airlines Logo
5:24 pm - 10:33 pmSTL-PDX
7h 09m1 stop
$244United Airlines
Find Deal
Wed, Oct 29 - Fri, Oct 31
Alaska Airlines Logo
1:25 pm - 12:03 amPDX-STL
8h 38m1 stop
Alaska Airlines Logo
7:00 am - 12:38 pmSTL-PDX
7h 38m1 stop
$248Alaska Airlines
Find Deal
Fri, Oct 24 - Tue, Oct 28
Delta Logo
7:40 am - 6:40 pmBOI-STL
10h 00m2 stops
Delta Logo
6:00 am - 4:06 pmSTL-BOI
11h 06m2 stops
$249Delta
Find Deal
Wed, Oct 22 - Wed, Oct 29
Delta Logo
7:00 am - 6:57 pmRDM-STL
9h 57m2 stops
Delta Logo
10:45 am - 10:53 pmSTL-RDM
14h 08m2 stops
$249Delta
Find Deal
Wed, Nov 12 - Sat, Nov 15
Multiple Airlines Logo
12:28 pm - 9:07 amBOI-STL
19h 39m1 stop
Multiple Airlines Logo
8:40 pm - 9:09 pmSTL-BOI
25h 29m2 stops
$278Multiple Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
United Airlines Logo
8:30 am - 4:43 pmPDX-STL
6h 13m1 stop
United Airlines Logo
6:30 am - 2:46 pmSTL-PDX
10h 16m2 stops
$290United Airlines
Find Deal
Sun, Feb 8 - Wed, Feb 11
Alaska Airlines Logo
9:00 am - 12:03 amBOI-STL
14h 03m1 stop
Alaska Airlines Logo
4:14 pm - 10:20 pmSTL-BOI
7h 06m1 stop
$296Alaska Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
Multiple Airlines Logo
8:55 pm - 9:06 amEUG-STL
10h 11m2 stops
Multiple Airlines Logo
4:51 pm - 2:12 pmSTL-EUG
23h 21m1 stop
$532Multiple Airlines
Find Deal
Sun, Oct 5 - Sat, Oct 11

Southwest flights from Oregon to St. Louis

Our best Southwest deals on Oregon to St. Louis flight tickets
Southwest
Oct 29
PDX7:00 amPortland
8h 50m
2 stops
STL5:50 pmLambert-St Louis
Oct 31
STL3:15 pmLambert-St Louis
6h 50m
1 stop
PDX8:05 pmPortland
$279
Find similar
Southwest
Oct 27
BOI12:35 pmBoise Air Term. Gowen Fld
10h 35m
1 stop
STL12:10 amLambert-St Louis
Oct 30
STL5:15 amLambert-St Louis
8h 05m
2 stops
BOI12:20 pmBoise Air Term. Gowen Fld
$308
Find similar
Southwest
Oct 16
BOI12:35 pmBoise Air Term. Gowen Fld
10h 35m
1 stop
STL12:10 amLambert-St Louis
Oct 21
STL5:55 amLambert-St Louis
5h 50m
1 stop
BOI10:45 amBoise Air Term. Gowen Fld
$332
Find similar

Hawaiian Airlines flights from Oregon to St. Louis

Our best Hawaiian Airlines deals on Oregon to St. Louis flight tickets
Hawaiian Airlines
Mar 3
EUG5:00 amEugene
6h 52m
1 stop
STL1:52 pmLambert-St Louis
Mar 4
STL2:55 pmLambert-St Louis
8h 07m
1 stop
EUG9:02 pmEugene
$360
Find similar
Hawaiian Airlines
Mar 3
EUG5:00 amEugene
6h 52m
1 stop
STL1:52 pmLambert-St Louis
Mar 4
STL7:00 amLambert-St Louis
7h 37m
1 stop
EUG12:37 pmEugene
$363
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Oregon to St. Louis 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 25, 2025.
Use the filters below to find and compare flights from Oregon to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 11/6

12:33 pm-9:07 am

1 stop19h 34m

Lambert-St Louis

Sat 11/8

7:45 pm-11:48 am

1 stop17h 03m

$212

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 10/23

12:43 pm-9:07 am

1 stop18h 24m

Lambert-St Louis

Sat 10/25

7:52 pm-10:58 am

2 stops41h 06m

$241

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 10/29

8:30 am-4:28 pm

1 stop5h 58m

Lambert-St Louis

Fri 10/31

5:24 pm-10:33 pm

1 stop7h 09m

$244

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 10/24

1:25 pm-12:03 am

1 stop8h 38m

Lambert-St Louis

Tue 10/28

7:00 am-12:38 pm

1 stop7h 38m

$248

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Wed 10/22

7:40 am-6:40 pm

2 stops10h 00m

Lambert-St Louis

Wed 10/29

6:00 am-4:06 pm

2 stops11h 06m

$249

RedmondSt. Louis

RDM - STL

RDMSTL

Bend/Redmond

Wed 11/12

7:00 am-6:57 pm

2 stops9h 57m

Lambert-St Louis

Sat 11/15

10:45 am-10:53 pm

2 stops14h 08m

$249

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 10/23

12:28 pm-9:07 am

1 stop19h 39m

Lambert-St Louis

Thu 10/30

8:40 pm-9:09 pm

2 stops25h 29m

$278

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sun 2/8

8:30 am-4:43 pm

1 stop6h 13m

Lambert-St Louis

Wed 2/11

6:30 am-2:46 pm

2 stops10h 16m

$290

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 10/23

9:00 am-12:03 am

1 stop14h 03m

Lambert-St Louis

Thu 10/30

4:14 pm-10:20 pm

1 stop7h 06m

$296

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Sun 10/5

8:55 pm-9:06 am

2 stops10h 11m

Lambert-St Louis

Sat 10/11

4:51 pm-2:12 pm

1 stop23h 21m

$532

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 St. Louis from

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

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 St. Louis?

In general, January is the cheapest month to fly from Oregon to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $280. The month of October is another great option to travel to St. Louis, with average flight prices from Oregon averaging around $322.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $379. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $621. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Oregon in the evening is the least expensive time of day to depart. momondo users have found prices as low as $288 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $679 per ticket.

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

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

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Oregon when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $380 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Oregon for as low as $245 on momondo.

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

There is only 1 cabin class available to choose from on Oregon to Lambert-St Louis 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 Oregon to St. Louis flights?

You could potentially save up to 38% on your flight if you consider stops on a Oregon to St. Louis flight.

Cheap Oregon to St. Louis flight deals and tips

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

Direct flights

None
There are no direct flights from Oregon to St. Louis. Popular non-direct route for this connection is Portland Airport - Lambert-St Louis Airport.
Search flight deals

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

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

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

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

    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 Oregon to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. 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 Oregon to St. Louis?

Best airlines flying from Oregon to St. Louis

Compare and see reviews for airlines that fly from Oregon to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $118Free CancellationRating
5.8
3,163 reviews
Search Frontier flights
DeltaPriceFrom $192Free CancellationRating
7.9
7,973 reviews
Search Delta flights
American AirlinesPriceFrom $226Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
SouthwestPriceFrom $247Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $262Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

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 Oregon to St. Louis for you.

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

All flight searches from Oregon to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Oregon to St. Louis 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 Oregon to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Oregon to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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