What’s the cheapest layover airport for flights from St. Louis to Portland?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $244.

What’s the top layover airport for flights from St. Louis to Portland?

Seattle (SEA) – chosen by Cheapflights users on 50% of 1-stop itineraries from St. Louis to Portland on Cheapflights.

Which airport typically offers the quickest layover for flights from St. Louis to Portland?

Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 0h 48m.

What’s the fastest layover option from St. Louis to Portland?

Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 6h 05m.

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.

How long is the flight from St. Louis to Portland?

Airlines like Alaska Airlines, Delta, and United Airlines fly from St. Louis to Portland in about 4h 10m. The time it takes to get you to your destination can typically vary by up to 6h 10m. St. Louis and Portland are separated by a distance of 1702 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Currently priced at $118, Frontier will fly you from St. Louis to Portland and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from $188 and $219, respectively. These flights start at 67% lower than the current average price 3 months from now.

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.

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).

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 Delta, Southwest or United Airlines 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 Denver 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 Salt Lake City least frequently.

What are some popular things to do or see while on a layover in Denver?

Denver travelers tend to visit Coors Field, 16th Street Mall, and Paramount Theatre more than anywhere else. Coors Field, 16th Street Mall, and Paramount Theatre can be accessed by traveling approximately 18.4 mi, 18.7 mi, and 18.6 mi, respectively from Denver Intl. Those looking to explore during their layover in Denver can rent a car from Denver Intl for about $50 per day.

Most accurate provider : When it comes to deals on St. Louis-Portland flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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.

$60+ Flights from St. Louis to Portland

Q: How much does it cost to fly round-trip from St. Louis to Portland?

Airfare is below average for this route at the moment. St. Louis to Portland flights typically cost between $289 and $527 in January. The cheapest round-trip price found within the last 3 days was $209 on Delta (Jan 12-Jan 19).

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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 April, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from St. Louis to Portland

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$209 (Delta)
One-way from	$60 (Trip.com)
Popular in	March
Cheapest in	September
Average price	$373

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. 4% potential increase in price ($15 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 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 November 21, 2025.

Sat 12/135:00 pmSTL - PDX

1 stop7h 10mDelta

Fri 1/91:39 pmPDX - STL

1 stop5h 56mDelta

Deal found 11/19

$229

Wed 12/32:20 pmSTL - PDX

1 stop5h 54mDelta

Mon 12/155:05 pmPDX - STL

1 stop5h 43mDelta

Deal found 11/19

$230

Thu 12/112:20 pmSTL - PDX

2 stops10h 20mDelta

Mon 12/157:30 pmPDX - STL

2 stops11h 40mDelta

Deal found 11/19

$236

Fri 12/122:38 pmSTL - PDX

1 stop9h 32mDelta

Sun 12/141:59 pmPDX - STL

1 stop7h 30mDelta

Deal found 11/19

$249

Thu 12/186:00 amSTL - PDX

1 stop8h 54mDelta

Thu 12/252:11 pmPDX - STL

1 stop6h 05mDelta

Deal found 11/19

$268

Sat 12/66:00 amSTL - PDX

1 stop8h 54mDelta

Mon 12/810:05 amPDX - STL

1 stop7h 05mDelta

Deal found 11/20

$297

Sat 12/207:43 pmSTL - PDX

1 stop18h 00mFrontier

Wed 12/243:59 pmPDX - STL

2 stops22h 25mFrontier

Deal found 11/19

$306

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 November 21, 2025.

Wed 5/136:20 pmSTL - PDX

Nonstop4h 10mAlaska Airlines

Mon 5/189:30 amPDX - STL

1 stop5h 52mAlaska Airlines

Deal found 11/18

$233

Thu 12/112:20 pmSTL - PDX

2 stops10h 20mDelta

Mon 12/157:30 pmPDX - STL

2 stops11h 40mDelta

Deal found 11/19

$236

Tue 3/246:30 amSTL - PDX

2 stops9h 14mUnited Airlines

Tue 3/317:42 pmPDX - STL

1 stop8h 10mUnited Airlines

Deal found 11/20

$242

Tue 1/204:35 pmSTL - PDX

1 stop8h 18mUnited Airlines

Wed 1/217:00 amPDX - STL

1 stop8h 43mUnited Airlines

Deal found 11/20

$243

Thu 5/76:30 amSTL - PDX

1 stop8h 24mDelta

Tue 5/125:05 pmPDX - STL

1 stop5h 31mDelta

Deal found 11/20

$243

Tue 1/206:40 amSTL - PDX

1 stop7h 52mDelta

Tue 1/2012:40 amPDX - STL

1 stop8h 03mDelta

Deal found 11/20

$243

Mon 1/196:00 amSTL - PDX

1 stop8h 18mUnited Airlines

Mon 1/2611:05 pmPDX - STL

1 stop9h 36mUnited Airlines

Deal found 11/20

$249

Fri 2/66:35 amSTL - PDX

2 stops14h 15mDelta

Mon 2/96:00 amPDX - STL

1 stop6h 38mDelta

Deal found 11/19

$252

Thu 1/87:00 amSTL - PDX

1 stop7h 32mDelta

Mon 1/127:10 amPDX - STL

2 stops12h 25mDelta

Deal found 11/19

$252

Sat 12/136:00 amSTL - PDX

1 stop8h 54mDelta

Fri 1/911:10 amPDX - STL

2 stops10h 15mDelta

Deal found 11/19

$252

Thu 1/87:00 amSTL - PDX

1 stop7h 32mDelta

Sun 1/1111:10 amPDX - STL

2 stops10h 15mDelta

Deal found 11/18

$252

Last-minute flights from St. Louis to Portland
Discover last-minute flight deals from St. Louis to Portland. Data last updated November 21, 2025 and is based on user searches.

Wed 12/37:43 pmSTL - PDX

1 stop18h 13mFrontier

Sun 12/77:26 pmPDX - STL

1 stop13h 56mFrontier

Deal found 11/18

$211

Wed 12/32:20 pmSTL - PDX

1 stop5h 54mDelta

Mon 12/155:05 pmPDX - STL

1 stop5h 43mDelta

Deal found 11/18

$230

Sat 12/65:00 pmSTL - PDX

1 stop7h 58mDelta

Mon 12/85:05 pmPDX - STL

1 stop5h 43mDelta

Deal found 11/18

$250

Thu 12/112:20 pmSTL - PDX

2 stops10h 20mDelta

Mon 12/157:30 pmPDX - STL

2 stops11h 40mDelta

Deal found 11/19

$236

Fri 12/122:38 pmSTL - PDX

1 stop9h 32mDelta

Sun 12/141:59 pmPDX - STL

1 stop7h 30mDelta

Deal found 11/19

$249

Sat 12/135:00 pmSTL - PDX

1 stop7h 10mDelta

Fri 1/91:39 pmPDX - STL

1 stop5h 56mDelta

Deal found 11/19

$229

Thu 12/186:00 amSTL - PDX

1 stop8h 54mDelta

Thu 12/252:11 pmPDX - STL

1 stop6h 05mDelta

Deal found 11/19

$268

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 November 21, 2025.

Wed 12/177:43 pmSTL - PDX

1 stop18h 00mFrontier

Deal found 11/18

$60

Sat 1/173:43 pmSTL - PDX

1 stop21h 21mFrontier

Deal found 11/18

$62

Sun 12/1410:44 pmSTL - PDX

1 stop11h 52mFrontier

Deal found 11/18

$75

Wed 12/37:43 pmSTL - PDX

1 stop18h 13mFrontier

Deal found 11/19

$84

Wed 1/143:43 pmSTL - PDX

2 stops20h 50mFrontier

Deal found 11/18

$97

Tue 12/163:30 pmSTL - PDX

2 stops46h 13mFrontier

Deal found 11/18

$103

Tue 12/1612:49 pmSTL - PDX

1 stop6h 54mDelta

Deal found 11/19

$105

Thu 12/412:04 pmSTL - PDX

2 stops23h 30mFrontier

Deal found 11/19

$109

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

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

Thu 12/11

2:20 pm-10:40 pm

2 stops10h 20m

Portland

Mon 12/15

7:30 pm-9:10 am

2 stops11h 40m

$236

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 3/24

6:30 am-1:44 pm

2 stops9h 14m

Portland

Tue 3/31

7:42 pm-5:52 am

1 stop8h 10m

$242

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 1/20

4:35 pm-10:53 pm

1 stop8h 18m

Portland

Wed 1/21

7:00 am-5:43 pm

1 stop8h 43m

$243

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 5/7

6:30 am-12:54 pm

1 stop8h 24m

Portland

Tue 5/12

5:05 pm-12:36 am

1 stop5h 31m

$243

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Tue 1/20

6:40 am-12:32 pm

1 stop7h 52m

Portland

Tue 1/20

12:40 am-10:43 am

1 stop8h 03m

$243

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Mon 1/19

6:00 am-12:18 pm

1 stop8h 18m

Portland

Mon 1/26

11:05 pm-10:41 am

1 stop9h 36m

$249

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 2/6

6:35 am-6:50 pm

2 stops14h 15m

Portland

Mon 2/9

6:00 am-2:38 pm

1 stop6h 38m

$252

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 1/8

7:00 am-12:32 pm

1 stop7h 32m

Portland

Mon 1/12

7:10 am-9:35 pm

2 stops12h 25m

$252

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 12/13

6:00 am-12:54 pm

1 stop8h 54m

Portland

Fri 1/9

11:10 am-11:25 pm

2 stops10h 15m

$252

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 21 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 November.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust Score*3 stars
CheapOair	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-Portland flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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

Prices

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

Booking 66 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, February is the cheapest month in which you can book a flight from St. Louis to Portland (average of $163). Flying from St. Louis to Portland in March is currently the most expensive (average of $265). 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 44% versus a flight in the afternoon.

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 afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from St. Louis to Portland?

Reviews of airlines servicing Portland

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from St. Louis to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

Alaska Airlines

8.0

Very good

11,326 reviews

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

Southwest

8.0

Very good

4,251 reviews

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

Delta

7.9

Good

8,002 reviews

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

United Airlines

7.4

Good

9,028 reviews

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

American Airlines

7.2

Good

11,047 reviews

Alaska Airlines

8.0

Very good

11,326 reviews

Reviews

1 / 20

10.0

Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

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.
How long is the flight from St. Louis to Portland?
Airlines like Alaska Airlines, Delta, and United Airlines fly from St. Louis to Portland in about 4h 10m. The time it takes to get you to your destination can typically vary by up to 6h 10m. St. Louis and Portland are separated by a distance of 1702 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from St. Louis to Portland round-trip?
Currently priced at $118, Frontier will fly you from St. Louis to Portland and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from $188 and $219, respectively. These flights start at 67% lower than the current average price 3 months from now.
Where are the most common layover locations when flying from St. Louis to Portland?
St. Louis to Portland flights have a layover in Denver most of the time.
What are some popular things to do or see while on a layover in Denver?
Denver travelers tend to visit Coors Field, 16th Street Mall, and Paramount Theatre more than anywhere else. Coors Field, 16th Street Mall, and Paramount Theatre can be accessed by traveling approximately 18.4 mi, 18.7 mi, and 18.6 mi, respectively from Denver Intl. Those looking to explore during their layover in Denver can rent a car from Denver Intl for about $50 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 Salt Lake City 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, February is the cheapest month in which you can book a flight from St. Louis to Portland (average of $163). Flying from St. Louis to Portland in March is currently the most expensive (average of $265). 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.

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Other flights to Portland

Top 7 airlines flying from St. Louis to Portland

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$118	Average$245	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$188	Average$349	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$219	Average$336	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$226	Average$399	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$235	Average$394	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$248	Average$373	FlexibilityNo cancel fee	On-time75%
Hawaiian Airlines	Cheapest$338	Average$520	FlexibilityNo cancel fee	On-time85%

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$60+ 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 12/17. 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 April, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 November 21, 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 November 21, 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 November.

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?

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?

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

How much does it cost to fly round-trip from St. Louis to Portland?

What’s the top layover airport for flights from St. Louis to Portland?

What’s the cheapest layover airport for flights from St. Louis to Portland?

What’s the fastest layover option from St. Louis to Portland?

Which airport typically offers the quickest layover for flights from St. Louis to Portland?

Reviews of airlines servicing Portland

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from St. Louis to Portland to help guide your decision. You can also see how each airline stacks up in terms of 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?

How long is the flight from St. Louis to Portland?

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

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 Denver?

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?

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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 November 21, 2025.