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 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 August 2025. The most frequent departure day is Mon, with 25% of weekly flights leaving on this day.

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

Seattle (SEA) was the most common stop: 37% of momondo users choosing 1-stop flights on this route connected there.

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 37% 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 travel time from St. Louis to Portland?

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

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

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Portland

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 August 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.

$78 Cheap Flights from St. Louis to Portland (STL-PDX) in 2025

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Find the cheapest flights from St. Louis to Portland (STL-PDX)

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:52 pm - 11:38 amSTL-PDX

17h 46m1 stop

12:44 pm - 9:07 amPDX-STL

18h 23m1 stop

$215Frontier

Find Deal

mié., oct. 8 - lun., oct. 13

7:55 pm - 12:12 amSTL-PDX

6h 17m1 stop

6:05 am - 9:06 amPDX-STL

25h 01m1 stop

$216Frontier

Find Deal

jue., sep. 25 - dom., sep. 28

7:54 pm - 11:23 amSTL-PDX

17h 29m1 stop

7:15 am - 9:06 amPDX-STL

23h 51m1 stop

$219Frontier

Find Deal

sáb., ago. 30 - sáb., sep. 6

8:40 pm - 11:56 amSTL-PDX

17h 16m1 stop

3:26 pm - 9:07 amPDX-STL

15h 41m1 stop

$221Frontier

Find Deal

mié., oct. 29 - dom., nov. 2

7:30 pm - 11:43 pmSTL-PDX

6h 13m1 stop

12:40 am - 8:51 amPDX-STL

6h 11m1 stop

$229Delta

Find Deal

vie., oct. 17 - jue., oct. 23

5:30 pm - 10:38 pmSTL-PDX

7h 08m1 stop

10:45 pm - 9:33 amPDX-STL

8h 48m1 stop

$231Delta

Find Deal

sáb., sep. 20 - sáb., sep. 27

1:39 pm - 8:37 pmSTL-PDX

8h 58m2 stops

12:54 pm - 10:08 pmPDX-STL

7h 14m1 stop

$234United Airlines

Find Deal

mar., sep. 16 - jue., sep. 18

1:40 pm - 5:21 pmSTL-PDX

5h 41m1 stop

5:00 am - 3:44 pmPDX-STL

8h 44m2 stops

$264United Airlines

Find Deal

jue., oct. 2 - sáb., oct. 4

7:00 am - 12:38 pmSTL-PDX

7h 38m1 stop

1:35 pm - 11:59 pmPDX-STL

8h 24m1 stop

$269Hawaiian Airlines

Find Deal

mié., oct. 29 - dom., nov. 2

1:20 pm - 9:15 pmSTL-PDX

9h 55m1 stop

6:40 am - 10:15 pmPDX-STL

13h 35m2 stops

$270Southwest

Find Deal

mié., sep. 24 - mié., oct. 1

Delta flights from St. Louis to Portland

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

Delta

Oct 17

STL7:30 pmLambert-St Louis

6h 13m

1 stop

PDX11:43 pmPortland

Oct 23

PDX12:40 amPortland

6h 11m

1 stop

STL8:51 amLambert-St Louis

$229

Find similar

Delta

Sep 20

STL5:30 pmLambert-St Louis

7h 08m

1 stop

PDX10:38 pmPortland

Sep 27

PDX10:45 pmPortland

8h 48m

1 stop

STL9:33 amLambert-St Louis

$231

Find similar

Delta

Oct 7

STL2:29 pmLambert-St Louis

11h 28m

2 stops

PDX11:57 pmPortland

Oct 17

PDX10:58 pmPortland

8h 39m

1 stop

STL9:37 amLambert-St Louis

$251

Find similar

United Airlines flights from St. Louis to Portland

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

United Airlines

Sep 16

STL1:39 pmLambert-St Louis

8h 58m

2 stops

PDX8:37 pmPortland

Sep 18

PDX12:54 pmPortland

7h 14m

1 stop

STL10:08 pmLambert-St Louis

$234

Find similar

United Airlines

Oct 2

STL1:40 pmLambert-St Louis

5h 41m

1 stop

PDX5:21 pmPortland

Oct 4

PDX5:00 amPortland

8h 44m

2 stops

STL3:44 pmLambert-St Louis

$264

Find similar

United Airlines

Oct 1

STL5:15 amLambert-St Louis

6h 14m

1 stop

PDX9:29 amPortland

Oct 7

PDX5:00 amPortland

8h 44m

2 stops

STL3:44 pmLambert-St Louis

$266

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

mié. 10/8

7:52 pm-11:38 am

1 stop17h 46m

Portland

lun. 10/13

12:44 pm-9:07 am

1 stop18h 23m

$215

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

jue. 9/25

7:55 pm-12:12 am

1 stop6h 17m

Portland

dom. 9/28

6:05 am-9:06 am

1 stop25h 01m

$216

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

sáb. 8/30

7:54 pm-11:23 am

1 stop17h 29m

Portland

sáb. 9/6

7:15 am-9:06 am

1 stop23h 51m

$219

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

mié. 10/29

8:40 pm-11:56 am

1 stop17h 16m

Portland

dom. 11/2

3:26 pm-9:07 am

1 stop15h 41m

$221

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

vie. 10/17

7:30 pm-11:43 pm

1 stop6h 13m

Portland

jue. 10/23

12:40 am-8:51 am

1 stop6h 11m

$229

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

sáb. 9/20

5:30 pm-10:38 pm

1 stop7h 08m

Portland

sáb. 9/27

10:45 pm-9:33 am

1 stop8h 48m

$231

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

mar. 9/16

1:39 pm-8:37 pm

2 stops8h 58m

Portland

jue. 9/18

12:54 pm-10:08 pm

1 stop7h 14m

$234

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

jue. 10/2

1:40 pm-5:21 pm

1 stop5h 41m

Portland

sáb. 10/4

5:00 am-3:44 pm

2 stops8h 44m

$264

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

mié. 10/29

7:00 am-12:38 pm

1 stop7h 38m

Portland

dom. 11/2

1:35 pm-11:59 pm

1 stop8h 24m

$269

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

mié. 9/24

1:20 pm-9:15 pm

1 stop9h 55m

Portland

mié. 10/1

6:40 am-10:15 pm

2 stops13h 35m

$270

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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 $306, 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 November to fly from St. Louis, when ticket prices are also cheap, with an average price of $314.

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 Saturday, with ticket prices averaging around $562.

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. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $562 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 $358 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 $300 on momondo.

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

There are 1 cabin classes 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 August 2025, prices for St. Louis to Portland flights are approximately 13% 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 05m
Direct flights	Mon and Sun
Airports in Portland	1 airport

The fastest flight from St. Louis to Portland takes 4h 05m

Direct flights go from St. Louis to Portland on Monday and Sunday. 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 32m 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 August 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 737-700 Passenger/BBJ1 (winglets) (58.33% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (25.00%), Boeing 737 MAX 8 (8.33%), and Airbus A319 (8.33%).
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 (32% of total bookings). The next most popular airlines are Southwest (21%), United Airlines (16%), 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 $108	Free Cancellation	Rating 5.8 3,201 reviews	Search Frontier flights
American Airlines	PriceFrom $212	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $217	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights
Southwest	PriceFrom $226	Free Cancellation	Rating 8.0 4,243 reviews	Search Southwest flights
United Airlines	PriceFrom $245	Free Cancellation	Rating 7.4 8,940 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $246	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Hawaiian Airlines	PriceFrom $338	Free Cancellation	Rating 7.8 2,679 reviews	Search Hawaiian Airlines flights

Southwest Flights From St. Louis to Portland
Southwest is one of the most popular airlines flying from St. Louis to Portland, operating 4 flights/week on average for this route. A good Southwest flight deal for St. Louis to Portland starts from $226 round-trip, up to an average price of $400. Our users have rated Southwest at 8.0/10.

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Vancouver

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Astoria

Long Beach

Depoe Bay

Rockaway Beach

Beaverton

Hillsboro

Hood River

Gresham

McMinnville

Longview

Tigard

The Dalles

Pacific City

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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sáb. 9/6

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Cheap flights from St. Louis to Portland from $78

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 10/2. 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

United Airlines flights from St. Louis to Portland

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

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Use the filters below to find and compare flights from St. Louis to Portland that are best for you.

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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 Saturday, with ticket prices averaging around $562.

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. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $562 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 are 1 cabin classes 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 August 2025, prices for St. Louis to Portland flights are approximately 13% 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, United Airlines, and American Airlines are the most popular carriers 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: 37% 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 August 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

Southwest 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