How popular is this St. Louis to Portland flight route?

Within the past month, 1 users have taken a look at flights from Lambert-St Louis to Portland.

What are the cheapest airlines flying from St. Louis to Portland round-trip?

Currently priced at $227, Delta will fly you from St. Louis to Portland and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Southwest - these airlines can fly you to your destination from $234 and $258, respectively. These flights start at 37% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Portland one-way?

To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $111. United Airlines flights start at $112 while deals on Frontier start at $139 one-way.

What are the most popular airlines that fly from St. Louis to Portland?

When booking a flight from St. Louis to Portland, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

Where are the most common layover locations when flying from St. Louis to Portland?

St. Louis to Portland flights have a layover in Salt Lake City most of the time.

Where are the least popular layover locations for St. Louis to Portland flights?

Flights departing from St. Louis and landing in Portland layover in Denver least frequently.

What are some popular things to do or see while on a layover in Salt Lake City?

Salt Lake City travelers tend to visit Temple Square, Abravanel Hall, and Salt Lake Temple more than anywhere else. Temple Square, Abravanel Hall, and Salt Lake Temple can be accessed by traveling approximately 4.7 mi, 4.7 mi, and 4.8 mi, respectively from Salt Lake City. Those looking to explore during their layover in Salt Lake City can rent a car from Salt Lake City for about $55 per day.

What is the cheapest day to fly round-trip from St. Louis to Portland?

Thursday flights are generally found to be more expensive for flights from St. Louis to Portland. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Portland.

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

To save on the cost of your flight from St. Louis to Portland, book at least 61 days before your planned departure. Booking around this time can save you about 68% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $234 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $363.

What is the cheapest month to fly from St. Louis to Portland?

The best pricing can be found in the month of September. Prices to Portland from St. Louis average $362. You can even find prices in September for less than $362, as users have found deals to Portland from as low as $149. The month of March appears to be one of the more expensive times to travel to Portland from St. Louis. Flying in the targeted month can save you up to 27%.

Most accurate provider : When it comes to deals on St. Louis-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Portland flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Portland flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Portland flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Portland that include hotel bookings?

Yes. In addition to deals on St. Louis to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Portland.

Can I find deals for business class flights from St. Louis to Portland?

Yes. Cheapflights offers flight deals from St. Louis to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$111+ Flights from St. Louis to Portland

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to Portland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Portland are usually found in September or November, booked 89 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from St. Louis to Portland

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$227 (Delta)
One-way from	$111 (Hawaiian Airlines)
Popular in	March
Cheapest in	September
Average price	$463

Provider with most accurate pricing for Lambert-St Louis-Portland flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Portland flights.

Search Deals

From Lambert-St Louis to Portland

Search Deals

One-way flight from Lambert-St Louis to Portland

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Find flight deals from St. Louis to Portland

Cheapest flights from St. Louis to Portland
Explore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Tue 6/37:19 pmSTL - PDX

1 stop6h 24mDelta

Mon 6/912:44 amPDX - STL

1 stop7h 50mDelta

Deal found 3/23

$227

Thu 5/295:00 amSTL - PDX

1 stop7h 24mAmerican Airlines

Thu 6/511:59 pmPDX - STL

1 stop7h 19mAmerican Airlines

Deal found 3/24

$234

Tue 4/225:55 pmSTL - PDX

1 stop7h 15mSouthwest

Tue 4/295:20 amPDX - STL

2 stops10h 25mSouthwest

Deal found 3/23

$258

Sun 8/105:00 amSTL - PDX

1 stop6h 42mUnited Airlines

Fri 8/1511:59 pmPDX - STL

1 stop8h 41mUnited Airlines

Deal found 3/24

$262

Fri 4/116:38 pmSTL - PDX

1 stop16h 09mFrontier

Sun 4/136:40 amPDX - STL

1 stop24h 26mFrontier

Deal found 3/24

$300

Thu 4/176:44 amSTL - PDX

1 stop7h 41mHawaiian Airlines

Tue 4/222:30 pmPDX - STL

1 stop7h 29mHawaiian Airlines

Deal found 3/24

$304

Sun 4/206:10 pmSTL - PDX

2 stops17h 02mMultiple Airlines

Wed 4/232:32 pmPDX - STL

3 stops27h 38mMultiple Airlines

Deal found 3/24

$333

Thu 4/176:44 amSTL - PDX

1 stop7h 41mAlaska Airlines

Tue 4/2210:47 amPDX - STL

2 stops11h 12mAlaska Airlines

Deal found 3/24

$360

Best flights from St. Louis to Portland
Discover carefully curated flight deals from St. Louis to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Tue 6/37:19 pmSTL - PDX

1 stop6h 24mDelta

Mon 6/912:44 amPDX - STL

1 stop7h 50mDelta

Deal found 3/23

$227

Thu 5/295:00 amSTL - PDX

1 stop7h 24mAmerican Airlines

Thu 6/511:59 pmPDX - STL

1 stop7h 19mAmerican Airlines

Deal found 3/24

$234

Tue 4/225:55 pmSTL - PDX

1 stop7h 15mSouthwest

Tue 4/295:20 amPDX - STL

2 stops10h 25mSouthwest

Deal found 3/23

$258

Sun 8/105:00 amSTL - PDX

1 stop6h 42mUnited Airlines

Fri 8/1511:59 pmPDX - STL

1 stop8h 41mUnited Airlines

Deal found 3/24

$262

Fri 4/116:38 pmSTL - PDX

1 stop16h 09mFrontier

Sun 4/136:40 amPDX - STL

1 stop24h 26mFrontier

Deal found 3/24

$300

Thu 4/176:44 amSTL - PDX

1 stop7h 41mHawaiian Airlines

Tue 4/222:30 pmPDX - STL

1 stop7h 29mHawaiian Airlines

Deal found 3/24

$304

Sun 4/206:10 pmSTL - PDX

2 stops17h 02mMultiple Airlines

Wed 4/232:32 pmPDX - STL

3 stops27h 38mMultiple Airlines

Deal found 3/24

$333

Thu 4/176:44 amSTL - PDX

1 stop7h 41mAlaska Airlines

Tue 4/2210:47 amPDX - STL

2 stops11h 12mAlaska Airlines

Deal found 3/24

$360

Last-minute flights from St. Louis to Portland
Discover last-minute flight deals from St. Louis to Portland. Data last updated March 25, 2025 and is based on user searches.

Thu 4/36:15 amSTL - PDX

1 stop8h 46mUnited Airlines

Mon 4/712:54 pmPDX - STL

1 stop6h 56mUnited Airlines

Deal found 3/24

$365

Thu 4/37:40 amSTL - PDX

1 stop6h 42mDelta

Mon 4/72:00 pmPDX - STL

2 stops8h 28mDelta

Deal found 3/24

$444

Thu 4/31:00 pmSTL - PDX

3 stops30h 55mMultiple Airlines

Mon 4/76:50 pmPDX - STL

2 stops21h 02mMultiple Airlines

Deal found 3/24

$453

Wed 4/96:30 amSTL - PDX

1 stop7h 22mUnited Airlines

Sat 4/126:00 amPDX - STL

2 stops13h 50mUnited Airlines

Deal found 3/24

$338

Fri 4/116:38 pmSTL - PDX

1 stop16h 09mFrontier

Sun 4/136:40 amPDX - STL

1 stop24h 26mFrontier

Deal found 3/24

$300

Mon 4/147:15 pmSTL - PDX

1 stop6h 29mDelta

Thu 4/175:26 pmPDX - STL

1 stop5h 16mDelta

Deal found 3/24

$241

Thu 4/176:44 amSTL - PDX

1 stop7h 41mHawaiian Airlines

Tue 4/222:30 pmPDX - STL

1 stop7h 29mHawaiian Airlines

Deal found 3/24

$304

Thu 4/176:44 amSTL - PDX

1 stop7h 41mAlaska Airlines

Tue 4/2210:47 amPDX - STL

2 stops11h 12mAlaska Airlines

Deal found 3/24

$360

Sun 4/206:10 pmSTL - PDX

2 stops17h 02mMultiple Airlines

Wed 4/232:32 pmPDX - STL

3 stops27h 38mMultiple Airlines

Deal found 3/24

$333

Sun 4/206:10 pmSTL - PDX

2 stops17h 02mSpirit Airlines

Wed 4/232:32 pmPDX - STL

2 stops24h 43mSpirit Airlines

Deal found 3/24

$346

Tue 4/225:55 pmSTL - PDX

1 stop7h 15mSouthwest

Tue 4/295:20 amPDX - STL

2 stops10h 25mSouthwest

Deal found 3/23

$258

Mon 4/286:20 pmSTL - PDX

1 stop7h 42mAmerican Airlines

Fri 5/22:58 pmPDX - STL

1 stop6h 35mAmerican Airlines

Deal found 3/25

$227

One-way flights from St. Louis to Portland
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Sat 4/196:44 amSTL - PDX

1 stop7h 41mHawaiian Airlines

Deal found 3/24

$111

Tue 6/106:10 amSTL - PDX

1 stop8h 12mUnited Airlines

Deal found 3/24

$112

Wed 4/26:51 pmSTL - PDX

1 stop7h 46mFrontier

Deal found 3/24

$139

Fri 4/257:15 pmSTL - PDX

1 stop6h 29mDelta

Deal found 3/24

$140

Sun 5/2510:20 amSTL - PDX

1 stop9h 11mSun Country Air

Deal found 3/24

$143

Wed 5/712:15 pmSTL - PDX

3 stops30h 30mMultiple Airlines

Deal found 3/24

$162

Tue 4/296:10 pmSTL - PDX

3 stops41h 47mSpirit Airlines

Deal found 3/24

$165

Tue 4/226:30 amSTL - PDX

2 stops9h 20mAlaska Airlines

Deal found 3/24

$187

Mon 6/235:29 pmSTL - PDX

1 stop7h 40mAmerican Airlines

Deal found 3/24

$192

Mon 5/128:50 amSTL - PDX

2 stops11h 00mSouthwest

Deal found 3/24

$232

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 6/3

7:19 pm-11:43 pm

1 stop6h 24m

Portland

Tue 6/10

12:44 am-10:34 am

1 stop7h 50m

$227

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 5/29

5:00 am-10:24 am

1 stop7h 24m

Portland

Thu 6/5

11:59 pm-9:18 am

1 stop7h 19m

$234

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 4/22

5:55 pm-11:10 pm

1 stop7h 15m

Portland

Tue 4/29

5:20 am-5:45 pm

2 stops10h 25m

$258

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 8/10

5:00 am-9:42 am

1 stop6h 42m

Portland

Fri 8/15

11:59 pm-10:40 am

1 stop8h 41m

$262

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 4/11

6:38 pm-8:47 am

1 stop16h 09m

Portland

Sun 4/13

6:40 am-9:06 am

1 stop24h 26m

$300

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 4/17

6:44 am-12:25 pm

1 stop7h 41m

Portland

Tue 4/22

2:30 pm-11:59 pm

1 stop7h 29m

$304

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sun 4/20

6:10 pm-9:12 am

2 stops17h 02m

Portland

Wed 4/23

2:32 pm-8:10 pm

3 stops27h 38m

$333

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 4/17

6:44 am-12:25 pm

1 stop7h 41m

Portland

Tue 4/22

10:47 am-11:59 pm

2 stops11h 12m

$360

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 4/19

6:44 am-12:25 pm

1 stop7h 41m

$111

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 4/22

5:00 pm-11:44 pm

1 stop8h 44m

$112

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 18 results

Compare providers for flights from St. Louis to Portland

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Portland in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Portland flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Portland flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Portland flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Portland flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Portland

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

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Portland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to Portland?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Portland (average of $277). Flying from St. Louis to Portland in March is currently the most expensive (average of $370). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to PDX?

When flying from St. Louis to Portland, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 10% versus a flight at noon.

What is the cheapest day to fly from St. Louis to Portland?

Travelers seeking maximum savings on their St. Louis to Portland flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Portland by month

In terms of precipitation, rainfall in Portland ranges from 0.7 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Portland when rainfall is around 0.7 in.

Temperature in Portland by month

If weather is an important factor for your trip to Portland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from St. Louis to Portland, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,785 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,272 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,890 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.9

Good

2,330 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,605 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

How popular is this St. Louis to Portland flight route?
Within the past month, 1 users have taken a look at flights from Lambert-St Louis to Portland.
What are the cheapest airlines flying from St. Louis to Portland round-trip?
Currently priced at $227, Delta will fly you from St. Louis to Portland and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Southwest - these airlines can fly you to your destination from $234 and $258, respectively. These flights start at 37% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from St. Louis to Portland one-way?
To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $111. United Airlines flights start at $112 while deals on Frontier start at $139 one-way.
Where are the most common layover locations when flying from St. Louis to Portland?
St. Louis to Portland flights have a layover in Salt Lake City most of the time.
What are some popular things to do or see while on a layover in Salt Lake City?
Salt Lake City travelers tend to visit Temple Square, Abravanel Hall, and Salt Lake Temple more than anywhere else. Temple Square, Abravanel Hall, and Salt Lake Temple can be accessed by traveling approximately 4.7 mi, 4.7 mi, and 4.8 mi, respectively from Salt Lake City. Those looking to explore during their layover in Salt Lake City can rent a car from Salt Lake City for about $55 per day.
Where are the least popular layover locations for St. Louis to Portland flights?
Flights departing from St. Louis and landing in Portland layover in Denver least frequently.
Can I find deals for flights from St. Louis to Portland that include hotel bookings?
Yes. In addition to deals on St. Louis to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Portland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Portland.
Can I find deals for business class flights from St. Louis to Portland?
Yes. Cheapflights offers flight deals from St. Louis to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Portland?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Portland (average of $277). Flying from St. Louis to Portland in March is currently the most expensive (average of $370). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Lincoln City

Beaverton

Seaside

Clackamas

Vancouver

McMinnville

Lake Oswego

Hillsboro

Gresham

Long Beach

Cannon Beach

Tigard

Astoria

Hood River

Woodburn

Depoe Bay

Pacific City

Stevenson

Troutdale

Longview

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Portland

Complete your trip

Portland car rentals

Portland Airport car rentals

Medford car rentals

Salem car rentals

Eugene car rentals

Brookings car rentals

Downtown car rentals

Southeast Portland car rentals

Pearl District car rentals

North Portland car rentals

Southwest Portland car rentals

Northeast Portand car rentals

Other flights to Portland

Top 7 airlines flying from St. Louis to Portland

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$94	Average$180	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$98	Average$188	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$177	Average$371	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$204	Average$470	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$215	Average$358	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$216	Average$376	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$247	Average$408	FlexibilityNo cancel fee	On-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$111+ Cheap flights from St. Louis to Portland (STL - PDX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/19. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Portland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Portland are usually found in September or November, booked 89 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from St. Louis to Portland

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Portland

Cheapest flights from St. Louis to PortlandExplore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from St. Louis to Portland

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Portland in March.

Best time to book a flight from St. Louis to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Portland

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Portland. Price data was last updated on March 21, 2025.

What is the cheapest month to book a flight from St. Louis to Portland?

What is the cheapest time of day to fly from STL to PDX?

Find hourly flight availability from St. Louis to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

What is the cheapest day to fly from St. Louis to Portland?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Portland. Price data was last updated on December 16, 2024.

Rainfall in Portland by month

Plan your trip to Portland by taking into account the average rainfall totals by month.

Temperature in Portland by month

Plan your trip to Portland by taking into account the average temperature totals by month.

Reviews of airlines servicing Portland

Read through reviews of airlines operating flights from St. Louis to Portland, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How popular is this St. Louis to Portland flight route?

What are the cheapest airlines flying from St. Louis to Portland round-trip?

What are the cheapest airlines to fly from St. Louis to Portland one-way?

Where are the most common layover locations when flying from St. Louis to Portland?

What are some popular things to do or see while on a layover in Salt Lake City?

Where are the least popular layover locations for St. Louis to Portland flights?

Can I find deals for flights from St. Louis to Portland that include hotel bookings?

How can I find direct flights from St. Louis to Portland?

Can I find deals for business class flights from St. Louis to Portland?

What is the cheapest month to book a flight from St. Louis to Portland?

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from St. Louis to Portland

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to Portland
Explore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.