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

Frontier, Hawaiian Airlines, and Alaska Airlines are the most popular carriers 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 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.

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.

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 33% 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.

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 October 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.

$63 Cheap Flights from St. Louis to Portland in 2025/26

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Cheap round-trip flights

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7:52 pm - 11:56 amSTL-PDX

18h 04m1 stop

12:52 pm - 9:07 amPDX-STL

18h 15m1 stop

$229Frontier

Find Deal

Mon, Oct 27 - Thu, Oct 30

8:40 pm - 10:18 amSTL-PDX

39h 38m2 stops

3:26 pm - 9:07 amPDX-STL

15h 41m1 stop

$230Frontier

Find Deal

Wed, Oct 29 - Mon, Nov 3

1:00 pm - 10:40 pmSTL-PDX

11h 40m2 stops

2:23 pm - 12:46 amPDX-STL

8h 23m2 stops

$236Delta

Find Deal

Sat, Nov 15 - Mon, Nov 17

5:24 pm - 10:36 pmSTL-PDX

7h 12m1 stop

5:00 am - 12:39 pmPDX-STL

5h 39m1 stop

$244United Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

5:00 pm - 10:54 pmSTL-PDX

7h 54m1 stop

6:15 am - 4:50 pmPDX-STL

8h 35m1 stop

$249Delta

Find Deal

Sat, Feb 14 - Sat, Mar 7

7:40 am - 1:30 pmSTL-PDX

7h 50m1 stop

5:10 am - 2:35 pmPDX-STL

7h 25m2 stops

$254Southwest

Find Deal

Wed, Nov 5 - Mon, Nov 10

6:00 pm - 10:59 pmSTL-PDX

6h 59m1 stop

9:10 am - 9:00 pmPDX-STL

9h 50m2 stops

$285United Airlines

Find Deal

Mon, Feb 16 - Fri, Mar 6

6:00 am - 10:48 amSTL-PDX

6h 48m1 stop

10:15 pm - 9:35 amPDX-STL

9h 20m1 stop

$290American Airlines

Find Deal

Tue, Nov 11 - Tue, Nov 18

2:05 pm - 8:18 pmSTL-PDX

8h 13m1 stop

3:15 pm - 11:51 pmPDX-STL

6h 36m1 stop

$300American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

5:15 pm - 9:40 pmSTL-PDX

6h 25m1 stop

5:00 am - 5:30 pmPDX-STL

10h 30m1 stop

$319Southwest

Find Deal

Wed, Nov 26 - Mon, Dec 1

Southwest flights from St. Louis to Portland

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

Southwest

Nov 5

STL7:40 amLambert-St Louis

7h 50m

1 stop

PDX1:30 pmPortland

Nov 10

PDX5:10 amPortland

7h 25m

2 stops

STL2:35 pmLambert-St Louis

$254

Find similar

Southwest

Nov 26

STL5:15 pmLambert-St Louis

6h 25m

1 stop

PDX9:40 pmPortland

Dec 1

PDX5:00 amPortland

10h 30m

1 stop

STL5:30 pmLambert-St Louis

$319

Find similar

Southwest

Oct 29

STL11:50 amLambert-St Louis

9h 50m

2 stops

PDX7:40 pmPortland

Nov 3

PDX5:30 amPortland

9h 45m

2 stops

STL5:15 pmLambert-St Louis

$445

Find similar

Frontier flights from St. Louis to Portland

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

Frontier

Oct 27

STL7:52 pmLambert-St Louis

18h 04m

1 stop

PDX11:56 amPortland

Oct 30

PDX12:52 pmPortland

18h 15m

1 stop

STL9:07 amLambert-St Louis

$229

Find similar

Frontier

Oct 29

STL8:40 pmLambert-St Louis

39h 38m

2 stops

PDX10:18 amPortland

Nov 3

PDX3:26 pmPortland

15h 41m

1 stop

STL9:07 amLambert-St Louis

$230

Find similar

Frontier

Nov 5

STL7:45 pmLambert-St Louis

18h 11m

1 stop

PDX11:56 amPortland

Nov 10

PDX3:26 pmPortland

15h 41m

1 stop

STL9:07 amLambert-St Louis

$231

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 10/27

7:52 pm-11:56 am

1 stop18h 04m

Portland

Thu 10/30

12:52 pm-9:07 am

1 stop18h 15m

$229

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 10/29

8:40 pm-10:18 am

2 stops39h 38m

Portland

Mon 11/3

3:26 pm-9:07 am

1 stop15h 41m

$230

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 11/15

1:00 pm-10:40 pm

2 stops11h 40m

Portland

Mon 11/17

2:23 pm-12:46 am

2 stops8h 23m

$236

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 11/7

5:24 pm-10:36 pm

1 stop7h 12m

Portland

Tue 11/11

5:00 am-12:39 pm

1 stop5h 39m

$244

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 2/14

5:00 pm-10:54 pm

1 stop7h 54m

Portland

Sat 3/7

6:15 am-4:50 pm

1 stop8h 35m

$249

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 11/5

7:40 am-1:30 pm

1 stop7h 50m

Portland

Mon 11/10

5:10 am-2:35 pm

2 stops7h 25m

$254

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 2/16

6:00 pm-10:59 pm

1 stop6h 59m

Portland

Fri 3/6

9:10 am-9:00 pm

2 stops9h 50m

$285

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 11/11

6:00 am-10:48 am

1 stop6h 48m

Portland

Tue 11/18

10:15 pm-9:35 am

1 stop9h 20m

$290

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 11/7

2:05 pm-8:18 pm

1 stop8h 13m

Portland

Tue 11/11

3:15 pm-11:51 pm

1 stop6h 36m

$300

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 11/26

5:15 pm-9:40 pm

1 stop6h 25m

Portland

Mon 12/1

5:00 am-5:30 pm

1 stop10h 30m

$319

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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

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 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 $360 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 October 2025, prices for St. Louis to Portland flights are approximately 26% 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

Direct flights	None

There are no direct flights from St. Louis to Portland. There are no popular flight routes from St. Louis to Portland.

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 6h 25m 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 October 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) (50.00% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (30.00%), Boeing 737 MAX 8 (10.00%), and Airbus A319 (10.00%).
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 (28% of total bookings). The next most popular airlines are Southwest (23%), United Airlines (19%), 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 3,137 reviews	Search Frontier flights
American Airlines	PriceFrom $208	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Delta	PriceFrom $215	Free Cancellation	Rating 7.9 7,980 reviews	Search Delta flights
Southwest	PriceFrom $226	Free Cancellation	Rating 8.0 4,241 reviews	Search Southwest flights
United Airlines	PriceFrom $234	Free Cancellation	Rating 7.4 8,982 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $248	Free Cancellation	Rating 8.0 11,103 reviews	Search Alaska Airlines flights
Hawaiian Airlines	PriceFrom $338	Free Cancellation	Rating 7.8 2,781 reviews	Search Hawaiian Airlines flights

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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

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Cheap flights from St. Louis to Portland from $63

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 12/6. 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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Southwest flights from St. Louis to Portland

Our best Southwest 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 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 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 October 2025, prices for St. Louis to Portland flights are approximately 26% 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, Hawaiian Airlines, and Alaska 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: 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.

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

Direct flights

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

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