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

Currently priced at $160, Frontier will fly you from Portland to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $227 and $228, respectively. Users have found that Frontier is 59% cheaper than the other options available to this destination.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $75. American Airlines flights start at $114 while deals on Spirit Airlines start at $132 one-way.

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

Before booking your flight from Portland to St. Louis check out the most popular airlines for this route: American Airlines, Alaska Airlines or Delta.

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

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

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

Of the flights from Portland to St. Louis that have layovers, the fewest flights stop in Denver.

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

If you're on a layover in Salt Lake City and looking for things to do, consider visiting Temple Square, Abravanel Hall, or Salt Lake Temple. Temple Square, Abravanel Hall, and Salt Lake Temple are located about 4.7 mi, 4.7 mi, and 4.8 mi, respectively from Salt Lake City. Travelers can rent a car at Salt Lake City for an average daily rate of $53 to make sightseeing during their layover a little easier.

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

Travelers have found that booking a Thursday departure is the best way to save up to 17% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

To save on the cost of your flight from Portland to St. Louis, book at least 31 days before your planned departure. Booking around this time can save you about 105% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $324 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $452.

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

January can be a great time to fly to St. Louis from Portland with a flight ticket averaging about $394. Cheapflights users have found deals in the month of January for as cheap as $198. The most expensive prices can be found in the month of December.

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

Most trusted provider : When it comes to deals on Portland-St. Louis 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 Portland-St. Louis 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 Portland to St. Louis that include hotel bookings?

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

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

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

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

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

$75+ Save on Flights from Portland to St. Louis

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Find cheap flights from Portland to St. Louis 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.

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The best prices from Portland to Lambert-St Louis are usually found in January or September, booked 72 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from Portland to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$160 (CheapOair)
One-way from	$75 (Frontier)
Popular in	December
Cheapest in	January
Average price	$402

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

Search Deals

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

Search Deals

From Portland to Lambert-St Louis

Search Deals

One-way flight from Portland to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($16 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 February 2025

Search Deals

Find flight deals from Portland to St. Louis

Cheapest flights from Portland to St. Louis
Explore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Tue 3/1810:06 amPDX - STL

1 stop21h 10mFrontier

Thu 3/206:38 pmSTL - PDX

1 stop16h 02mFrontier

Deal found 2/19

$160

Wed 4/25:40 amPDX - STL

1 stop5h 43mDelta

Tue 4/85:00 pmSTL - PDX

1 stop8h 44mDelta

Deal found 2/20

$227

Tue 4/157:00 amPDX - STL

1 stop6h 47mUnited Airlines

Fri 5/26:11 pmSTL - PDX

1 stop8h 59mUnited Airlines

Deal found 2/20

$228

Fri 4/182:58 pmPDX - STL

1 stop6h 35mAmerican Airlines

Sun 4/206:20 pmSTL - PDX

1 stop7h 42mAmerican Airlines

Deal found 2/20

$272

Mon 4/143:02 pmPDX - STL

1 stop6h 57mAlaska Airlines

Sat 4/196:44 amSTL - PDX

1 stop6h 08mAlaska Airlines

Deal found 2/20

$286

Wed 2/261:33 pmPDX - STL

1 stop8h 26mMultiple Airlines

Sat 3/17:04 pmSTL - PDX

1 stop7h 33mMultiple Airlines

Deal found 2/20

$311

Thu 4/173:00 pmPDX - STL

1 stop7h 05mSouthwest

Mon 4/215:00 amSTL - PDX

2 stops9h 00mSouthwest

Deal found 2/20

$327

Sun 3/22:54 pmPDX - STL

1 stop7h 05mHawaiian Airlines

Mon 3/103:21 pmSTL - PDX

1 stop8h 33mHawaiian Airlines

Deal found 2/19

$399

Best flights from Portland to St. Louis
Discover carefully curated flight deals from Portland to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 20, 2025.

Thu 5/16:20 amPDX - STL

1 stop6h 47mFrontier

Sun 5/49:55 pmSTL - PDX

1 stop19h 47mFrontier

Deal found 2/19

$160

Wed 4/25:40 amPDX - STL

1 stop5h 43mDelta

Tue 4/85:00 pmSTL - PDX

1 stop8h 44mDelta

Deal found 2/20

$227

Tue 4/157:00 amPDX - STL

1 stop6h 47mUnited Airlines

Fri 5/26:11 pmSTL - PDX

1 stop8h 59mUnited Airlines

Deal found 2/20

$228

Tue 4/16:13 pmPDX - STL

3 stops47h 57mMultiple Airlines

Tue 4/86:47 pmSTL - PDX

3 stops39h 35mMultiple Airlines

Deal found 2/19

$294

Tue 3/186:30 amPDX - STL

2 stops9h 10mSouthwest

Thu 3/206:05 amSTL - PDX

1 stop8h 05mSouthwest

Deal found 2/19

$332

Fri 4/43:02 pmPDX - STL

1 stop6h 57mAlaska Airlines

Mon 4/76:44 amSTL - PDX

2 stops12h 34mAlaska Airlines

Deal found 2/19

$395

Sun 3/22:54 pmPDX - STL

1 stop7h 05mHawaiian Airlines

Mon 3/103:21 pmSTL - PDX

1 stop8h 33mHawaiian Airlines

Deal found 2/19

$399

Thu 6/1211:59 pmPDX - STL

1 stop6h 55mAmerican Airlines

Mon 6/167:55 pmSTL - PDX

1 stop6h 32mAmerican Airlines

Deal found 2/19

$404

Last-minute flights from Portland to St. Louis
Discover last-minute flight deals from Portland to St. Louis. Data last updated February 20, 2025 and is based on user searches.

Tue 2/2512:59 amPDX - STL

1 stop8h 00mDelta

Sat 3/15:00 pmSTL - PDX

1 stop7h 49mDelta

Deal found 2/20

$473

Wed 2/261:33 pmPDX - STL

1 stop8h 26mMultiple Airlines

Sat 3/17:04 pmSTL - PDX

1 stop7h 33mMultiple Airlines

Deal found 2/20

$311

Fri 2/285:08 amPDX - STL

1 stop7h 17mAlaska Airlines

Tue 3/47:00 amSTL - PDX

1 stop9h 24mAlaska Airlines

Deal found 2/20

$472

Fri 2/285:00 amPDX - STL

2 stops8h 40mUnited Airlines

Mon 3/31:39 pmSTL - PDX

1 stop6h 18mUnited Airlines

Deal found 2/19

$569

Sun 3/26:32 amPDX - STL

1 stop24h 44mFrontier

Sun 3/96:38 pmSTL - PDX

1 stop16h 02mFrontier

Deal found 2/19

$192

Sun 3/22:54 pmPDX - STL

1 stop7h 05mHawaiian Airlines

Mon 3/103:21 pmSTL - PDX

1 stop8h 33mHawaiian Airlines

Deal found 2/19

$399

Sun 3/25:40 pmPDX - STL

1 stop5h 50mSouthwest

Mon 3/108:45 amSTL - PDX

2 stops12h 00mSouthwest

Deal found 2/20

$467

Thu 3/136:32 amPDX - STL

1 stop24h 44mFrontier

Sat 3/227:03 pmSTL - PDX

1 stop7h 34mFrontier

Deal found 2/19

$160

Tue 3/186:30 amPDX - STL

2 stops9h 10mSouthwest

Thu 3/206:05 amSTL - PDX

1 stop8h 05mSouthwest

Deal found 2/19

$332

Tue 3/257:31 pmPDX - STL

2 stops13h 31mUnited Airlines

Tue 4/15:54 pmSTL - PDX

1 stop8h 36mUnited Airlines

Deal found 2/19

$322

Tue 3/2511:59 pmPDX - STL

1 stop6h 49mAmerican Airlines

Tue 4/17:02 amSTL - PDX

1 stop8h 20mAmerican Airlines

Deal found 2/19

$417

Mon 3/3112:59 amPDX - STL

1 stop7h 35mDelta

Tue 4/83:30 pmSTL - PDX

1 stop7h 09mDelta

Deal found 2/19

$227

One-way flights from Portland to St. Louis
Search for one-way flight options from Portland to St. Louis. Find affordable one-way fares based on user searches. Data last updated February 20, 2025.

Thu 5/16:20 amPDX - STL

1 stop6h 47mFrontier

Deal found 2/20

$75

Mon 5/1211:55 pmPDX - STL

1 stop7h 54mAmerican Airlines

Deal found 2/20

$114

Mon 4/142:33 pmPDX - STL

2 stops24h 43mSpirit Airlines

Deal found 2/20

$132

Thu 4/35:26 pmPDX - STL

1 stop5h 02mDelta

Deal found 2/19

$140

Wed 4/237:54 amPDX - STL

1 stop6h 58mUnited Airlines

Deal found 2/19

$159

Mon 5/1211:10 amPDX - STL

2 stops10h 49mAlaska Airlines

Deal found 2/20

$182

Fri 5/166:30 pmPDX - STL

3 stops22h 02mMultiple Airlines

Deal found 2/20

$225

Mon 2/245:30 amPDX - STL

2 stops10h 40mSouthwest

Deal found 2/19

$242

Find flights from Portland to St. Louis within your budget

Fly from

Fly to

Route

Depart

Return

Price

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 3/18

10:06 am-9:16 am

1 stop21h 10m

Lambert-St Louis

Thu 3/20

6:38 pm-8:40 am

1 stop16h 02m

$160

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 4/2

5:40 am-1:23 pm

1 stop5h 43m

Lambert-St Louis

Tue 4/8

5:00 pm-11:44 pm

1 stop8h 44m

$227

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Tue 4/15

7:00 am-3:47 pm

1 stop6h 47m

Lambert-St Louis

Fri 5/2

6:11 pm-1:10 am

1 stop8h 59m

$228

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Fri 4/18

2:58 pm-11:33 pm

1 stop6h 35m

Lambert-St Louis

Sun 4/20

6:20 pm-12:02 am

1 stop7h 42m

$272

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Mon 4/14

3:02 pm-11:59 pm

1 stop6h 57m

Lambert-St Louis

Sat 4/19

6:44 am-10:52 am

1 stop6h 08m

$286

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Wed 2/26

1:33 pm-11:59 pm

1 stop8h 26m

Lambert-St Louis

Sat 3/1

7:04 pm-12:37 am

1 stop7h 33m

$311

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 4/17

3:00 pm-12:05 am

1 stop7h 05m

Lambert-St Louis

Mon 4/21

5:00 am-12:00 pm

2 stops9h 00m

$327

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Sun 3/2

2:54 pm-11:59 pm

1 stop7h 05m

Lambert-St Louis

Mon 3/10

3:21 pm-9:54 pm

1 stop8h 33m

$399

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Thu 5/1

6:20 am-3:07 pm

1 stop6h 47m

$75

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

Mon 5/12

11:55 pm-9:49 am

1 stop7h 54m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 16 results

Compare providers for flights from Portland to St. Louis

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

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

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portland 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.

Travel insights for flights from Portland to St. Louis

Get recent, data-driven insights about flights from Portland to St. Louis including ideal travel times, pricing trends, and more.

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

The best time to book flights from Portland to St. Louis is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Portland to St. Louis (average of $311). Flying from Portland to St. Louis in March is currently the most expensive (average of $356). 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 PDX to STL?

Unlike in the morning, when flights are generally more expensive, you can save up to 31% on flights from Portland to St. Louis by exploring options for tickets in the evening.

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

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

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

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

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest

8.1

Very good

4,411 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Alaska Airlines

8.0

Very good

9,692 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Delta

8.0

Very good

8,220 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Hawaiian Airlines

7.9

Good

2,317 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

United Airlines

7.4

Good

8,766 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Related info for your journey

What are the cheapest airlines flying from Portland to St. Louis round-trip?
Currently priced at $160, Frontier will fly you from Portland to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $227 and $228, respectively. Users have found that Frontier is 59% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Portland to St. Louis one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $75. American Airlines flights start at $114 while deals on Spirit Airlines start at $132 one-way.
Where are the most common layover locations when flying from Portland to St. Louis?
Portland to St. Louis 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?
If you're on a layover in Salt Lake City and looking for things to do, consider visiting Temple Square, Abravanel Hall, or Salt Lake Temple. Temple Square, Abravanel Hall, and Salt Lake Temple are located about 4.7 mi, 4.7 mi, and 4.8 mi, respectively from Salt Lake City. Travelers can rent a car at Salt Lake City for an average daily rate of $53 to make sightseeing during their layover a little easier.
Where are the least popular layover locations for Portland to St. Louis flights?
Of the flights from Portland to St. Louis that have layovers, the fewest flights stop in Denver.
Can I find deals for flights from Portland to St. Louis that include hotel bookings?
Yes. In addition to deals on Portland to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to St. Louis.
Can I find deals for business class flights from Portland to St. Louis?
Yes. Cheapflights offers flight deals from Portland to St. Louis 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 Portland to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Portland to St. Louis (average of $311). Flying from Portland to St. Louis in March is currently the most expensive (average of $356). 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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Top 6 airlines flying from Portland to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$111	Average$205	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$198	Average$413	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$216	Average$400	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$228	Average$437	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$254	Average$453	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$355	Average$542	FlexibilityNo cancel fee	On-time63%

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$75+ Cheap flights from Portland to St. Louis (PDX - STL)

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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

The best prices from Portland to Lambert-St Louis are usually found in January or September, booked 72 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from Portland to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to St. Louis

Cheapest flights from Portland to St. LouisExplore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Explore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Find flights from Portland to St. Louis within your budget

Compare providers for flights from Portland to St. Louis

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 Portland to St. Louis in February.

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

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

Travel insights for flights from Portland to St. Louis

Get recent, data-driven insights about flights from Portland to St. Louis including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to St. Louis. Price data was last updated on February 14, 2025.

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

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

Find hourly flight availability from Portland to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to St. Louis. Price data was last updated on February 16, 2025.

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Portland to St. Louis, such as Southwest, Alaska Airlines 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 Portland to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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 Portland to St. Louis flights?

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

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

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

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

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Alternative routes for Portland to St. Louis

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Top 6 airlines flying from Portland to St. Louis

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Cheapest flights from Portland to St. Louis
Explore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.