How long does it take to fly to St. Louis?

Flight times from Oregon to St. Louis vary, but if you’re flying out of Portland and flying into St. Louis (one of the most popular routes), then the duration is 3h 48m on average. Another popular route from Oregon to St. Louis is flying from Redmond to St. Louis, which will take roughly 5h 39m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to St. Louis?

Delta, United Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Oregon according to our data. Delta is the first choice among our users, with 35% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

Delta, United Airlines, and Alaska Airlines are the most popular carriers operating from Oregon to Lambert-St Louis

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?

As of December 2025, there are 6 operators available to choose from 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.

$68 Cheap Flights from Oregon to St. Louis in 2025/26

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Find the cheapest flights from Oregon to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:07 pm - 10:02 am

BOI

STL

20h 55m1 stop

3:43 pm - 1:16 pm

STL

BOI

22h 33m1 stop

$148Frontier

Sun, Jan 11 - Sat, Jan 17

5:26 pm - 11:39 am

PDX

STL

16h 13m1 stop

3:43 pm - 11:04 am

STL

PDX

21h 21m1 stop

$185Frontier

Sat, Jan 10 - Sat, Jan 17

11:59 am - 6:32 pm

PDX

STL

28h 33m1 stop

3:43 pm - 7:23 am

STL

PDX

17h 40m2 stops

$194Frontier

Thu, Jan 15 - Sat, Jan 17

12:07 pm - 12:12 pm

BOI

STL

23h 05m2 stops

3:43 pm - 1:16 pm

STL

BOI

22h 33m1 stop

$202Frontier

Sun, Jan 11 - Sat, Jan 17

12:40 am - 10:43 am

PDX

STL

8h 03m1 stop

3:31 pm - 8:32 pm

STL

PDX

7h 01m1 stop

$249Delta

Fri, Feb 6 - Wed, Feb 11

2:45 pm - 10:22 pm

PDX

STL

5h 37m1 stop

9:57 am - 6:56 pm

STL

PDX

10h 59m2 stops

$254United Airlines

Thu, Jan 1 - Thu, Jan 8

10:39 am - 9:35 pm

BOI

STL

9h 56m2 stops

6:10 am - 4:17 pm

STL

BOI

11h 07m2 stops

$256Delta

Thu, Jan 8 - Thu, Jan 15

2:58 pm - 10:02 am

BOI

STL

42h 04m2 stops

3:43 pm - 1:25 pm

STL

BOI

22h 42m1 stop

$285Multiple Airlines

Thu, Jan 8 - Wed, Jan 14

8:45 am - 1:54 pm

RDM

STL

27h 09m1 stop

6:19 pm - 9:15 pm

STL

RDM

28h 56m1 stop

$295Hawaiian Airlines

Sat, Jan 17 - Sat, Jan 24

6:34 pm - 5:47 am

MFR

STL

9h 13m1 stop

2:33 pm - 9:10 pm

STL

MFR

8h 37m1 stop

$578United Airlines

Mon, May 4 - Sun, May 10

United Airlines flights from Oregon to St. Louis

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

United Airlines

Jan 1

PDX2:45 pmPortland

5h 37m

1 stop

STL10:22 pmLambert-St Louis

Jan 8

STL9:57 amLambert-St Louis

10h 59m

2 stops

PDX6:56 pmPortland

$254

Find similar

United Airlines

Jan 6

PDX11:05 pmPortland

9h 36m

1 stop

STL10:41 amLambert-St Louis

Jan 11

STL6:00 amLambert-St Louis

8h 18m

1 stop

PDX12:18 pmPortland

$273

Find similar

United Airlines

Jan 8

PDX12:59 pmPortland

7h 01m

1 stop

STL10:00 pmLambert-St Louis

Jan 15

STL11:20 amLambert-St Louis

9h 36m

1 stop

PDX6:56 pmPortland

$277

Find similar

Frontier flights from Oregon to St. Louis

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

Frontier

Jan 11

BOI12:07 pmBoise Air Term. Gowen Fld

20h 55m

1 stop

STL10:02 amLambert-St Louis

Jan 17

STL3:43 pmLambert-St Louis

22h 33m

1 stop

BOI1:16 pmBoise Air Term. Gowen Fld

$148

Find similar

Frontier

Jan 10

PDX5:26 pmPortland

16h 13m

1 stop

STL11:39 amLambert-St Louis

Jan 17

STL3:43 pmLambert-St Louis

21h 21m

1 stop

PDX11:04 amPortland

$185

Find similar

Frontier

Jan 15

PDX11:59 amPortland

28h 33m

1 stop

STL6:32 pmLambert-St Louis

Jan 17

STL3:43 pmLambert-St Louis

17h 40m

2 stops

PDX7:23 amPortland

$194

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sun 1/11

12:07 pm-10:02 am

1 stop20h 55m

Lambert-St Louis

Sat 1/17

3:43 pm-1:16 pm

1 stop22h 33m

$148

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sat 1/10

5:26 pm-11:39 am

1 stop16h 13m

Lambert-St Louis

Sat 1/17

3:43 pm-11:04 am

1 stop21h 21m

$185

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 1/15

11:59 am-6:32 pm

1 stop28h 33m

Lambert-St Louis

Sat 1/17

3:43 pm-7:23 am

2 stops17h 40m

$194

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Sun 1/11

12:07 pm-12:12 pm

2 stops23h 05m

Lambert-St Louis

Sat 1/17

3:43 pm-1:16 pm

1 stop22h 33m

$202

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 2/6

12:40 am-10:43 am

1 stop8h 03m

Lambert-St Louis

Wed 2/11

3:31 pm-8:32 pm

1 stop7h 01m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 1/1

2:45 pm-10:22 pm

1 stop5h 37m

Lambert-St Louis

Thu 1/8

9:57 am-6:56 pm

2 stops10h 59m

$254

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 1/8

10:39 am-9:35 pm

2 stops9h 56m

Lambert-St Louis

Thu 1/15

6:10 am-4:17 pm

2 stops11h 07m

$256

BoiseSt. Louis

BOI - STL

BOISTL

Boise Air Term. Gowen Fld

Thu 1/8

2:58 pm-10:02 am

2 stops42h 04m

Lambert-St Louis

Wed 1/14

3:43 pm-1:25 pm

1 stop22h 42m

$285

RedmondSt. Louis

RDM - STL

RDMSTL

Bend/Redmond

Sat 1/17

8:45 am-1:54 pm

1 stop27h 09m

Lambert-St Louis

Sat 1/24

6:19 pm-9:15 pm

1 stop28h 56m

$295

MedfordSt. Louis

MFR - STL

MFRSTL

Medford

Mon 5/4

6:34 pm-5:47 am

1 stop9h 13m

Lambert-St Louis

Sun 5/10

2:33 pm-9:10 pm

1 stop8h 37m

$578

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 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

Prices

Airlines

Other information

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 $273. The month of November is another great option to travel to St. Louis, with average flight prices from Oregon averaging around $300.

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 $372 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 17% 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	$249
Fastest flight time	3h 48m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in St. Louis	1 airport

The best flight deal from Oregon to St. Louis found on momondo in the last 72 hours is $249

The fastest flight from Oregon to St. Louis takes 3h 48m

Direct flights go from Oregon to St. Louis on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.

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?
As of December 2025, there are 6 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from Oregon to St. Louis is Boeing 737 MAX 9, representing 25.00% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 21.43%, Boeing 737-800 Passenger/BBJ2 (winglets) at 14.29%, and Boeing 737 MAX 8 at 7.14%.

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
Frontier	PriceFrom $158	Free Cancellation	Rating 5.8 3,084 reviews	Search Frontier flights
Delta	PriceFrom $192	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
American Airlines	PriceFrom $226	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
United Airlines	PriceFrom $226	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Southwest	PriceFrom $248	Free Cancellation	Rating 7.9 4,253 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $265	Free Cancellation	Rating 8.0 11,431 reviews	Search Alaska Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

St. Peters

Collinsville

Alton

Farmington

Festus

Clayton

Glencoe

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.