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: 5h 50m.

What airlines fly to Portland?

Delta, United Airlines and Alaska 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 30% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 6 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?

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

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

Salt Lake City (SLC) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

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

The number of flights available between St. Louis and Portland is 1 per week as of April 2026. The most frequent departure day is Sat, with 100% of weekly flights leaving on this day.

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 6 as of April 2026.

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.

$122 Cheap Flights from St. Louis to Portland in 2026

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Find the cheapest flights from St. Louis to Portland

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:59 pm - 10:02 pm

STL

PDX

10h 03m

1 stop

5:05 pm - 12:30 am

PDX

STL

5h 25m

1 stop

$224Delta

Wed, May 13 - Mon, May 18

7:59 pm - 11:44 pm

STL

PDX

5h 45m

1 stop

11:15 pm - 9:32 am

PDX

STL

8h 17m

1 stop

$263Delta

Fri, Jun 5 - Mon, Jun 8

6:11 pm - 11:54 pm

STL

PDX

7h 43m

1 stop

12:59 am - 11:27 am

PDX

STL

8h 28m

1 stop

$271American Airlines

Fri, May 15 - Mon, May 18

6:59 pm - 11:41 pm

STL

PDX

6h 42m

1 stop

6:00 am - 1:21 pm

PDX

STL

5h 21m

1 stop

$276Delta

Mon, Aug 31 - Sun, Sep 6

5:33 pm - 7:50 pm

STL

PDX

4h 17mnonstop

10:37 am - 4:37 pm

PDX

STL

4h 00mnonstop

$277Alaska Airlines

Sat, May 30 - Tue, Jun 2

6:15 am - 11:20 am

STL

PDX

7h 05m

1 stop

5:50 am - 3:05 pm

PDX

STL

7h 15m

1 stop

$278Southwest

Sun, Aug 16 - Wed, Aug 19

5:33 pm - 7:50 pm

STL

PDX

4h 17mnonstop

10:37 am - 4:37 pm

PDX

STL

4h 00mnonstop

$283Alaska Airlines

Fri, May 29 - Wed, Jun 3

5:59 pm - 8:09 pm

STL

PDX

4h 10mnonstop

11:15 am - 5:03 pm

PDX

STL

3h 48mnonstop

$288Alaska Airlines

Sat, Sep 12 - Wed, Sep 23

5:59 pm - 8:09 pm

STL

PDX

4h 10mnonstop

11:15 am - 5:03 pm

PDX

STL

3h 48mnonstop

$289Alaska Airlines

Wed, Aug 26 - Tue, Sep 1

5:59 pm - 8:09 pm

STL

PDX

4h 10mnonstop

11:15 am - 5:03 pm

PDX

STL

3h 48mnonstop

$290Alaska Airlines

Sun, Sep 13 - Fri, Sep 25

United Airlines flights from St. Louis to Portland

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

United Airlines

May 23

STL7:23 pmLambert-St Louis

7h 27m

1 stop

PDX12:50 amPortland

May 26

PDX11:40 pmPortland

6h 59m

1 stop

STL8:39 amLambert-St Louis

$297

United Airlines

Jun 4

STL7:23 pmLambert-St Louis

7h 27m

1 stop

PDX12:50 amPortland

Jun 7

PDX11:40 pmPortland

7h 01m

1 stop

STL8:41 amLambert-St Louis

$313

United Airlines

Jul 2

STL5:10 amLambert-St Louis

6h 37m

1 stop

PDX9:47 amPortland

Jul 7

PDX4:15 pmPortland

5h 42m

1 stop

STL11:57 pmLambert-St Louis

$328

Frontier flights from St. Louis to Portland

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

Frontier

May 30

STL8:08 pmLambert-St Louis

17h 42m

2 stops

PDX11:50 amPortland

Jun 2

PDX5:46 pmPortland

23h 37m

1 stop

STL7:23 pmLambert-St Louis

$310

Frontier

May 10

STL8:08 pmLambert-St Louis

22h 38m

1 stop

PDX4:46 pmPortland

May 31

PDX5:31 pmPortland

47h 52m

2 stops

STL7:23 pmLambert-St Louis

$330

Frontier

Jun 4

STL9:06 pmLambert-St Louis

15h 14m

1 stop

PDX10:20 amPortland

Jun 8

PDX12:35 pmPortland

26h 55m

2 stops

STL5:30 pmLambert-St Louis

$341

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/13

1:59 pm-10:02 pm

1 stop10h 03m

Portland

Mon 5/18

5:05 pm-12:30 am

1 stop5h 25m

$224

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 6/5

7:59 pm-11:44 pm

1 stop5h 45m

Portland

Mon 6/8

11:15 pm-9:32 am

1 stop8h 17m

$263

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 5/15

6:11 pm-11:54 pm

1 stop7h 43m

Portland

Mon 5/18

12:59 am-11:27 am

1 stop8h 28m

$271

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 8/31

6:59 pm-11:41 pm

1 stop6h 42m

Portland

Sun 9/6

6:00 am-1:21 pm

1 stop5h 21m

$276

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 5/30

5:33 pm-7:50 pm

Nonstop4h 17m

Portland

Tue 6/2

10:37 am-4:37 pm

Nonstop4h 00m

$277

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 8/16

6:15 am-11:20 am

1 stop7h 05m

Portland

Wed 8/19

5:50 am-3:05 pm

1 stop7h 15m

$278

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 5/29

5:33 pm-7:50 pm

Nonstop4h 17m

Portland

Wed 6/3

10:37 am-4:37 pm

Nonstop4h 00m

$283

Quickest round-trip

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 9/12

5:59 pm-8:09 pm

Nonstop4h 10m

Portland

Wed 9/23

11:15 am-5:03 pm

Nonstop3h 48m

$288

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 8/26

5:59 pm-8:09 pm

Nonstop4h 10m

Portland

Tue 9/1

11:15 am-5:03 pm

Nonstop3h 48m

$289

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 9/13

5:59 pm-8:09 pm

Nonstop4h 10m

Portland

Fri 9/25

11:15 am-5:03 pm

Nonstop3h 48m

$290

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 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 typical price of a round-trip flight between St. Louis and Portland?

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from St. Louis is in January. Flight prices, which tend to average around $292, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in January, then you should wait until September to fly from St. Louis, when ticket prices are also cheap, with an average price of $296.

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 $289. 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 Monday, with ticket prices averaging around $594.

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 afternoon when flights can be purchased for as low as $404. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $520 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 from St. Louis 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 $354 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 $280 on momondo.

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

There are 3 cabin classes available to choose from on 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 April 2026, prices for St. Louis to Portland flights are approximately 14% cheaper 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

Best Price Found	$128
Fastest flight time	4h 10m
Direct flights	Every day
Airports in Portland	1 airport

The best one-way flight to Portland from St. Louis in the past 72 hours is $128. The best round-trip flight deal from St. Louis to Portland found on momondo in the last 72 hours is $329.

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

Direct flights go from St. Louis to Portland every day.

There is 1 airport in Portland. From St. Louis there are direct flights to Portland (PDX).

Search flight deals

Frequently asked questions about flying from St. Louis to Portland

How far is Lambert-St Louis to Portland by plane?
Portland is 1718.1 mi away from Lambert-St Louis. Typically, this will take 4h 10m 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 6 as of April 2026.
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 MAX 8 (34.21% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (31.58%), Boeing 737 (13.16%), and Embraer 175 (7.89%).
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 (25% of total bookings). The next most popular airlines are United Airlines (20%), Alaska Airlines (19%), and Southwest (19%).

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 $141	Free Cancellation	Rating 5.6 2,974 reviews	Search Frontier flights
American Airlines	PriceFrom $186	Free Cancellation	Rating 7.1 11,668 reviews	Search American Airlines flights
Delta	PriceFrom $217	Free Cancellation	Rating 7.9 8,462 reviews	Search Delta flights
Southwest	PriceFrom $226	Free Cancellation	Rating 8.0 4,321 reviews	Search Southwest flights
United Airlines	PriceFrom $244	Free Cancellation	Rating 7.4 9,668 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $249	Free Cancellation	Rating 7.9 12,299 reviews	Search Alaska Airlines flights

Southwest Flights From St. Louis to Portland
Southwest is one of the most popular airlines flying from St. Louis to Portland, operating 1 flight/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 $394. Our users have rated Southwest at 8.0/10.

Lincoln City

Seaside

Cannon Beach

Vancouver

Salem

Astoria

Long Beach

Rockaway Beach

Beaverton

Depoe Bay

Hillsboro

Tigard

Longview

Hood River

Troutdale

Newberg

McMinnville

The Dalles

Manzanita

Pacific City

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 $103

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 9/2. 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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How to get the cheapest flight ticket from St. Louis to Portland

What is the typical price of a round-trip flight between St. Louis and Portland?

What is the cheapest month to fly to Portland?

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

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

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

How far in advance should I book a flight from St. Louis to Portland?

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

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

What is the cheapest airline that flies 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?

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

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

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

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in Portland

Frequently asked questions about flying 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?

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

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