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

The number of flights available between St. Louis and Portland is 4 per week as of November 2025. The most frequent departure day is Mon, with 25% of weekly flights leaving on this day.

What airlines fly to Portland?

Delta, Southwest and United Airlines are the top three most popular airlines that fly to Portland from St. Louis according to our data. Delta is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 7 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from St. Louis to Portland?

Minneapolis (MSP) has the shortest average layover time for this route: 1h 00m.

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

Frontier is the most popular carrier operating from Lambert-St Louis to Portland

Which layover airport has the shortest travel time from St. Louis to Portland?

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 6h 06m.

Which layover airport offers the lowest fares from St. Louis to Portland?

Flights via Minneapolis (MSP) offer the lowest average round-trip price of $217.

Which airport is the most popular layover for flights between St. Louis and Portland?

Seattle (SEA) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Prices for flights from Lambert-St Louis Airport to Portland Airport are refreshed on a daily basis.

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

The number of operators available for flights from Lambert-St Louis Airport to Portland Airport is 7 as of November 2025.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Portland Airport.

What documentation or ID do you need to fly to Portland Airport?

The travel and health documents you'll need for your trip to Portland 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 Portland Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$60 Cheap Flights from St. Louis to Portland in 2025/26

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7:43 pm - 11:56 amSTL-PDX

18h 13m1 stop

7:26 pm - 11:22 amPDX-STL

13h 56m1 stop

$156Frontier

Find Deal

Sat, Dec 6 - Sun, Dec 7

7:43 pm - 12:23 pmSTL-PDX

18h 40m2 stops

12:10 pm - 10:02 amPDX-STL

19h 52m1 stop

$176Frontier

Find Deal

Wed, Jan 7 - Sun, Jan 11

7:43 pm - 11:56 amSTL-PDX

18h 13m1 stop

5:32 pm - 10:14 amPDX-STL

38h 42m2 stops

$180Frontier

Find Deal

Wed, Dec 10 - Mon, Dec 15

7:43 pm - 11:56 amSTL-PDX

18h 13m1 stop

9:48 am - 9:47 amPDX-STL

21h 59m2 stops

$207Frontier

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Sat, Dec 6 - Sat, Dec 13

7:00 am - 1:50 pmSTL-PDX

8h 50m1 stop

12:55 pm - 10:14 amPDX-STL

19h 19m1 stop

$213Multiple Airlines

Find Deal

Tue, Dec 9 - Fri, Dec 12

6:20 pm - 8:30 pmSTL-PDX

4h 10mnonstop

11:25 am - 5:13 pmPDX-STL

3h 48mnonstop

$223Alaska Airlines

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Wed, May 13 - Mon, May 18

6:20 pm - 8:30 pmSTL-PDX

4h 10mnonstop

9:30 am - 5:22 pmPDX-STL

5h 52m1 stop

$233Alaska Airlines

Find Deal

Wed, May 13 - Mon, May 18

6:00 am - 3:33 pmSTL-PDX

11h 33m2 stops

7:30 pm - 9:10 amPDX-STL

11h 40m2 stops

$236Delta

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Wed, Dec 10 - Mon, Dec 15

7:43 pm - 1:24 pmSTL-PDX

19h 41m2 stops

12:47 pm - 10:02 amPDX-STL

19h 15m1 stop

$239Frontier

Find Deal

Wed, Dec 24 - Tue, Dec 30

2:38 pm - 10:10 pmSTL-PDX

9h 32m1 stop

2:23 pm - 9:50 amPDX-STL

17h 27m2 stops

$242Delta

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Fri, Dec 12 - Sat, Dec 13

Delta flights from St. Louis to Portland

Our best Delta deals on St. Louis to Portland flight tickets

Delta

Jan 8

STL7:00 amLambert-St Louis

7h 32m

1 stop

PDX12:32 pmPortland

Jan 12

PDX1:39 pmPortland

5h 56m

1 stop

STL9:35 pmLambert-St Louis

$209

Find similar

Delta

Dec 3

STL2:20 pmLambert-St Louis

5h 54m

1 stop

PDX6:14 pmPortland

Dec 15

PDX5:05 pmPortland

5h 43m

1 stop

STL12:48 amLambert-St Louis

$230

Find similar

Delta

Dec 10

STL6:00 amLambert-St Louis

11h 33m

2 stops

PDX3:33 pmPortland

Dec 15

PDX7:30 pmPortland

11h 40m

2 stops

STL9:10 amLambert-St Louis

$236

Find similar

Frontier flights from St. Louis to Portland

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

Frontier

Dec 6

STL7:43 pmLambert-St Louis

18h 13m

1 stop

PDX11:56 amPortland

Dec 7

PDX7:26 pmPortland

13h 56m

1 stop

STL11:22 amLambert-St Louis

$156

Find similar

Frontier

Jan 7

STL7:43 pmLambert-St Louis

18h 40m

2 stops

PDX12:23 pmPortland

Jan 11

PDX12:10 pmPortland

19h 52m

1 stop

STL10:02 amLambert-St Louis

$176

Find similar

Frontier

Dec 10

STL7:43 pmLambert-St Louis

18h 13m

1 stop

PDX11:56 amPortland

Dec 15

PDX5:32 pmPortland

38h 42m

2 stops

STL10:14 amLambert-St Louis

$180

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 12/6

7:43 pm-11:56 am

1 stop18h 13m

Portland

Sun 12/7

7:26 pm-11:22 am

1 stop13h 56m

$156

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 1/7

7:43 pm-12:23 pm

2 stops18h 40m

Portland

Sun 1/11

12:10 pm-10:02 am

1 stop19h 52m

$176

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 12/10

7:43 pm-11:56 am

1 stop18h 13m

Portland

Mon 12/15

5:32 pm-10:14 am

2 stops38h 42m

$180

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 12/6

7:43 pm-11:56 am

1 stop18h 13m

Portland

Sat 12/13

9:48 am-9:47 am

2 stops21h 59m

$207

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 12/9

7:00 am-1:50 pm

1 stop8h 50m

Portland

Fri 12/12

12:55 pm-10:14 am

1 stop19h 19m

$213

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

6:20 pm-8:30 pm

Nonstop4h 10m

Portland

Mon 5/18

11:25 am-5:13 pm

Nonstop3h 48m

$223

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

6:20 pm-8:30 pm

Nonstop4h 10m

Portland

Mon 5/18

9:30 am-5:22 pm

1 stop5h 52m

$233

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 12/10

6:00 am-3:33 pm

2 stops11h 33m

Portland

Mon 12/15

7:30 pm-9:10 am

2 stops11h 40m

$236

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 12/24

7:43 pm-1:24 pm

2 stops19h 41m

Portland

Tue 12/30

12:47 pm-10:02 am

1 stop19h 15m

$239

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 12/12

2:38 pm-10:10 pm

1 stop9h 32m

Portland

Sat 12/13

2:23 pm-9:50 am

2 stops17h 27m

$242

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

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

Layovers

Other information

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from St. Louis is in September. Flight prices, which tend to average around $303, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in September, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $316.

What is the cheapest day to depart on your flight to Portland?

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $324. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $585.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $394. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $708 per ticket.

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

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

How far in advance should I book a flight to Portland?

You are more likely to see cheaper flights to Portland from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $359 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from St. Louis for as low as $286 on momondo.

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

There is only 1 cabin class available to choose from on Lambert-St Louis to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Portland flight prices changed over time?

As of November 2025, prices for St. Louis to Portland flights are approximately 41% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Portland

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Portland according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Portland (STL to PDX) flight deals and tips

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

Fastest flight time	4h 10m
Direct flights	Mon, Thu, Fri and Sat
Airports in Portland	1 airport

The fastest flight from St. Louis to Portland takes 4h 10m

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

There is 1 airport near Portland: Portland (PDX)

Search flight deals

How far is Lambert-St Louis to Portland by plane?
Portland is 1718.1 mi away from Lambert-St Louis. Typically, this will take 5h 54m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Portland Airport?
Prices for flights from Lambert-St Louis Airport to Portland Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Portland Airport?
The number of operators available for flights from Lambert-St Louis Airport to Portland Airport is 7 as of November 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Portland Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Portland Airport.
What documentation or ID do you need to fly to Portland Airport?
The travel and health documents you'll need for your trip to Portland 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 Portland 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 St. Louis to Portland?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Portland is Boeing 737-800 Passenger/BBJ2 (winglets) (50.00% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (16.67%), Airbus A319 (16.67%), and Boeing 737-700 Passenger/BBJ1 (winglets) (16.67%).
What is the most popular airline from St. Louis to Portland?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Portland is Delta (27% of total bookings). The next most popular airlines are Southwest (23%), United Airlines (20%), and American Airlines (14%).

Best airlines flying from St. Louis to Portland

Compare and see reviews for airlines that fly from St. Louis to Portland with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $118	Free Cancellation	Rating 5.8 3,103 reviews	Search Frontier flights
American Airlines	PriceFrom $188	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
Delta	PriceFrom $219	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Southwest	PriceFrom $226	Free Cancellation	Rating 8.0 4,245 reviews	Search Southwest flights
United Airlines	PriceFrom $235	Free Cancellation	Rating 7.4 9,017 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $248	Free Cancellation	Rating 8.0 11,316 reviews	Search Alaska Airlines flights
Hawaiian Airlines	PriceFrom $338	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights

United Airlines Flights From St. Louis to Portland
United Airlines is one of the most popular airlines flying from St. Louis to Portland, operating 4 flights/week on average for this route. A good United Airlines flight deal for St. Louis to Portland starts from $235 round-trip, up to an average price of $394. Our users have rated United Airlines at 7.4/10.

Lincoln City

Seaside

Cannon Beach

Vancouver

Salem

Astoria

Long Beach

Depoe Bay

Rockaway Beach

Beaverton

Hillsboro

Hood River

Gresham

McMinnville

Longview

The Dalles

Pacific City

Tigard

Manzanita

Tillamook

Why use momondo?

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

Finding the right flight to Portland from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portland quick and easy, saving you time and money.

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

Flights from St. Louis to Portland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to Portland flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Portland right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portland, momondo offers a useful price alert feature which will track prices for flights to Portland from St. Louis and alert you when they change.

An easier way to manage your Portland 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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Cheap flights from St. Louis to Portland 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 St. Louis to Portland departing on 12/17. 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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Delta flights from St. Louis to Portland

Our best Delta deals on St. Louis to Portland flight tickets

Frontier flights from St. Louis to Portland

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

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

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 Portland?

What is the cheapest day to depart on your flight to Portland?

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $324. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $585.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $394. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $708 per ticket.

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

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

How far in advance should I book a flight to Portland?

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

There is only 1 cabin class available to choose from on Lambert-St Louis to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Portland flight prices changed over time?

As of November 2025, prices for St. Louis to Portland flights are approximately 41% more expensive when compared to flights at the same time last year.

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

Frontier is the most popular carrier operating from Lambert-St Louis to Portland

What airlines fly to Portland?

Which airport is the most popular layover for flights between St. Louis and Portland?

Seattle (SEA) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Portland?

Flights via Minneapolis (MSP) offer the lowest average round-trip price of $217.

Which layover airport has the shortest travel time from St. Louis to Portland?

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 6h 06m.

Which layover airport has the shortest connection time from St. Louis to Portland?

Minneapolis (MSP) has the shortest average layover time for this route: 1h 00m.

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

The number of flights available between St. Louis and Portland is 4 per week as of November 2025. The most frequent departure day is Mon, with 25% of weekly flights leaving on this day.

When to book flights from St. Louis to Portland

Cheap St. Louis to Portland (STL to PDX) flight deals and tips

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

Fastest flight time

Direct flights

Airports in Portland

How far is Lambert-St Louis to Portland by plane?

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

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

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

What documentation or ID do you need to fly to Portland Airport?

What is the most popular plane model from St. Louis to Portland?

What is the most popular airline from St. Louis to Portland?

Best airlines flying from St. Louis to Portland

Compare and see reviews for airlines that fly from St. Louis to Portland with momondo

United Airlines Flights From St. Louis to Portland

Traveling to a place near Portland?

Why use momondo?

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

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

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

I’m not ready to book a flight from St. Louis to Portland right now. Can momondo alert me if prices change?

An easier way to manage your Portland 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Oregon