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Cheap flights from Oregon to St. Louis from $60

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 3/6. 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 Oregon to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:04 pm - 9:49 am
PDX
-
STL
19h 45m
1 stop
Frontier Logo
6:19 pm - 9:13 am
STL
-
PDX
16h 54m
1 stop
$183Frontier
Fri, Mar 6 - Sun, Mar 8
Delta Logo
5:15 am - 1:23 pm
EUG
-
STL
6h 08m
1 stop
Delta Logo
5:00 pm - 10:35 pm
STL
-
EUG
7h 35m
1 stop
$217Delta
Tue, Apr 14 - Sat, Apr 25
Frontier Logo
1:48 pm - 7:12 pm
PDX
-
STL
27h 24m
1 stop
Frontier Logo
8:12 pm - 11:03 am
STL
-
PDX
16h 51m
1 stop
$222Frontier
Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
11:18 am - 5:06 pm
PDX
-
STL
3h 48mnonstop
Alaska Airlines Logo
6:20 pm - 8:37 pm
STL
-
PDX
4h 17mnonstop
$229Alaska Airlines
Thu, May 21 - Wed, May 27
United Airlines Logo
2:24 pm - 10:59 pm
PDX
-
STL
6h 35m
1 stop
United Airlines Logo
5:59 pm - 10:54 pm
STL
-
PDX
6h 55m
1 stop
$232United Airlines
Sat, May 2 - Wed, May 6
Delta Logo
11:25 am - 11:23 pm
EUG
-
STL
9h 58m
2 stops
Delta Logo
7:15 am - 12:00 pm
STL
-
EUG
6h 45m
1 stop
$235Delta
Thu, Mar 5 - Wed, Mar 11
Delta Logo
12:59 pm - 9:38 pm
BOI
-
STL
7h 39m
1 stop
Delta Logo
7:00 am - 12:09 pm
STL
-
BOI
6h 09m
1 stop
$237Delta
Sat, Feb 28 - Sat, Mar 7
Delta Logo
1:53 pm - 11:23 pm
PDX
-
STL
7h 30m
1 stop
Delta Logo
1:39 pm - 9:53 pm
STL
-
PDX
10h 14m
1 stop
$237Delta
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
11:59 pm - 10:36 am
PDX
-
STL
8h 37m
1 stop
United Airlines Logo
6:02 pm - 10:59 pm
STL
-
PDX
6h 57m
1 stop
$238United Airlines
Wed, Mar 4 - Thu, Mar 5
Alaska Airlines Logo
5:00 am - 3:50 pm
PDX
-
STL
8h 50m
1 stop
Alaska Airlines Logo
6:20 pm - 8:37 pm
STL
-
PDX
4h 17mnonstop
$239Alaska Airlines
Sun, May 24 - Sat, May 30

Alaska Airlines flights from Oregon to St. Louis

Our best Alaska Airlines deals on Oregon to St. Louis flight tickets
Alaska Airlines
Apr 12
RDM1:23 pmBend/Redmond
8h 36m
1 stop
STL11:59 pmLambert-St Louis
Apr 15
STL3:50 pmLambert-St Louis
10h 08m
1 stop
RDM11:58 pmBend/Redmond
$282
Alaska Airlines
Mar 14
PDX6:00 amPortland
5h 51m
1 stop
STL1:51 pmLambert-St Louis
Mar 21
STL5:30 pmLambert-St Louis
8h 14m
1 stop
PDX11:44 pmPortland
$307
Alaska Airlines
Apr 5
EUG12:24 pmEugene
9h 35m
2 stops
STL11:59 pmLambert-St Louis
Apr 8
STL7:00 amLambert-St Louis
7h 30m
1 stop
EUG12:30 pmEugene
$320

United Airlines flights from Oregon to St. Louis

Our best United Airlines deals on Oregon to St. Louis flight tickets
United Airlines
May 2
PDX2:24 pmPortland
6h 35m
1 stop
STL10:59 pmLambert-St Louis
May 6
STL5:59 pmLambert-St Louis
6h 55m
1 stop
PDX10:54 pmPortland
$232
United Airlines
Mar 3
PDX12:57 pmPortland
7h 17m
1 stop
STL10:14 pmLambert-St Louis
Mar 10
STL6:51 amLambert-St Louis
7h 42m
1 stop
PDX12:33 pmPortland
$237
United Airlines
Mar 4
PDX11:59 pmPortland
8h 37m
1 stop
STL10:36 amLambert-St Louis
Mar 5
STL6:02 pmLambert-St Louis
6h 57m
1 stop
PDX10:59 pmPortland
$238

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 February 4, 2026.
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

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 3/6

12:04 pm-9:49 am

1 stop19h 45m

Lambert-St Louis

Sun 3/8

6:19 pm-9:13 am

1 stop16h 54m

$183

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Tue 4/14

5:15 am-1:23 pm

1 stop6h 08m

Lambert-St Louis

Sat 4/25

5:00 pm-10:35 pm

1 stop7h 35m

$217

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 4/15

1:48 pm-7:12 pm

1 stop27h 24m

Lambert-St Louis

Sat 4/18

8:12 pm-11:03 am

1 stop16h 51m

$222

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 5/21

11:18 am-5:06 pm

Nonstop3h 48m

Lambert-St Louis

Wed 5/27

6:20 pm-8:37 pm

Nonstop4h 17m

$229

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 5/2

2:24 pm-10:59 pm

1 stop6h 35m

Lambert-St Louis

Wed 5/6

5:59 pm-10:54 pm

1 stop6h 55m

$232

EugeneSt. Louis

EUG - STL

EUGSTL

Eugene

Thu 3/5

11:25 am-11:23 pm

2 stops9h 58m

Lambert-St Louis

Wed 3/11

7:15 am-12:00 pm

1 stop6h 45m

$235

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sat 2/28

12:59 pm-9:38 pm

1 stop7h 39m

Lambert-St Louis

Sat 3/7

7:00 am-12:09 pm

1 stop6h 09m

$237

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 3/3

1:53 pm-11:23 pm

1 stop7h 30m

Lambert-St Louis

Tue 3/10

1:39 pm-9:53 pm

1 stop10h 14m

$237

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 3/4

11:59 pm-10:36 am

1 stop8h 37m

Lambert-St Louis

Thu 3/5

6:02 pm-10:59 pm

1 stop6h 57m

$238

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sun 5/24

5:00 am-3:50 pm

1 stop8h 50m

Lambert-St Louis

Sat 5/30

6:20 pm-8:37 pm

Nonstop4h 17m

$239

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, November 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 $300. The month of September is another great option to travel to St. Louis, with average flight prices from Oregon averaging around $317.

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 Thursday when prices can be found for as low as $369. 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 morning is the least expensive time of day to depart. momondo users have found prices as low as $505 when looking at flights departing in the morning. 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 $366 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 $260 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 1% 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

Best Price Found

$242

Fastest flight time

3h 40m

Direct flights

Every day

Airports in St. Louis

1 airport
The best flight deal from Oregon to St. Louis found on momondo in the last 72 hours is $242
The fastest flight from Oregon to St. Louis takes 3h 40m
Direct flights go from Oregon to St. Louis every day.
There is 1 airport in St. Louis. From Oregon there are direct flights to Lambert-St Louis (STL).
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 $139Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,146 reviews
Search Delta flights
American AirlinesPriceFrom $226Free CancellationRating
7.2
11,222 reviews
Search American Airlines flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $242Free CancellationRating
8.0
11,839 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $248Free CancellationRating
8.0
4,274 reviews
Search Southwest 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
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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