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$66+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — STL
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in September or January, booked 30 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Portland to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$120
(CheapOair)

One-way from

$66
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$337
Provider with most accurate pricing for Portland-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Portland-Lambert-St Louis flights.
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From Portland to Lambert-St Louis
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One-way flight from Portland to Lambert-St Louis
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Highest demand for flights based on searches. 9% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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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 enero 21, 2025.

This CheapOair deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/245:16 pmPDX - STL
1 stop14h 45mFrontier
lun. 4/286:51 pmSTL - PDX
1 stop7h 51mFrontier
Deal found 1/20$120
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/227:05 amPDX - STL
1 stop6h 35mUnited Airlines
lun. 3/174:30 pmSTL - PDX
1 stop8h 25mUnited Airlines
Deal found 1/21$222
This Delta deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/2012:59 amPDX - STL
1 stop8h 00mDelta
lun. 2/246:00 amSTL - PDX
1 stop8h 52mDelta
Deal found 1/21$227
This Orbitz deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/227:00 amPDX - STL
1 stop7h 21mMultiple Airlines
dom. 3/211:08 pmSTL - PDX
1 stop11h 32mMultiple Airlines
Deal found 1/19$249
This Southwest deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/44:50 pmPDX - STL
1 stop6h 05mSouthwest
lun. 4/72:35 pmSTL - PDX
2 stops11h 40mSouthwest
Deal found 1/20$298
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/97:48 amPDX - STL
2 stops14h 11mAlaska Airlines
mié. 4/163:11 pmSTL - PDX
1 stop7h 40mAlaska Airlines
Deal found 1/20$325
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/221:48 amPDX - STL
1 stop8h 13mAmerican Airlines
mar. 7/296:11 pmSTL - PDX
1 stop8h 15mAmerican Airlines
Deal found 1/20$410

Find flights from Portland to St. Louis within your budget

Customize your flight search to find flights from Portland to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

jue. 4/24

5:16 pm-10:01 am

1 stop14h 45m

Lambert-St Louis

lun. 4/28

6:51 pm-12:42 am

1 stop7h 51m

$120

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

sáb. 2/22

7:05 am-3:40 pm

1 stop6h 35m

Lambert-St Louis

lun. 3/17

4:30 pm-10:55 pm

1 stop8h 25m

$222

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

jue. 2/20

12:59 am-10:59 am

1 stop8h 00m

Lambert-St Louis

lun. 2/24

6:00 am-12:52 pm

1 stop8h 52m

$227

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

sáb. 2/22

7:00 am-4:21 pm

1 stop7h 21m

Lambert-St Louis

dom. 3/2

11:08 pm-8:40 am

1 stop11h 32m

$249

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

vie. 4/4

4:50 pm-12:55 am

1 stop6h 05m

Lambert-St Louis

lun. 4/7

2:35 pm-12:15 am

2 stops11h 40m

$298

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mié. 4/9

7:48 am-11:59 pm

2 stops14h 11m

Lambert-St Louis

mié. 4/16

3:11 pm-8:51 pm

1 stop7h 40m

$325

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mar. 2/25

6:32 am-9:16 am

1 stop24h 44m

$66

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mié. 2/19

1:33 pm-11:59 pm

1 stop8h 26m

$113

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

mar. 2/18

12:59 am-10:59 am

1 stop8h 00m

$114

PortlandSt. Louis

PDX - STL

PDXSTL

Portland

lun. 2/3

5:30 pm-2:43 pm

2 stops19h 13m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 14 results
1
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust 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?

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 January 17, 2025.

The best time to book flights from Portland to St. Louis is 30 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?

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 enero 21, 2025.

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?

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

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

Rainfall in St. Louis by month

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

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

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated enero 21, 2025.
Read through reviews of airlines operating flights from Portland to St. Louis, such as Delta and Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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?

    Currently priced at $120, 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 United Airlines and Delta - these airlines can fly you to your destination from $222 and $227, respectively. Users have found that Frontier is 69% 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 $66. Alaska Airlines flights start at $113 while deals on Delta start at $114 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 $57 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.

See more FAQs

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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Top 6 airlines flying from Portland to St. Louis

Discover the top 6 airlines that operate flights from Portland to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$112Average$206FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$198Average$420FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$401FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$225Average$428FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$268Average$468FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$347Average$542FlexibilityNo cancel feeOn-time63%
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