STL - PWM

$240 Find Cheap Flights from St. Louis to Portland

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Portland departing on 1/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Portland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Portland, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Portland, as well as popular online travel agencies
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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$240
Overall average: $529
Multiple Airlines
Tue 1/27Mon 2/2
STL - PWM • 1 stop
Cheapest one-way
$415
Typical prices: $463-$466
Multiple Airlines
Thu 1/1
STL - PWM • 3 stops
Top airlines
Delta
Cheapest • from $327 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 50% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 11% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Portland!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Portland (STL-PWM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Portland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Portland

Tue, Jan 27 - Mon, Feb 2
Multiple Airlines Logo
5:42 pm - 10:22 am
STL
-
PWM
15h 40m1 stop
Multiple Airlines Logo
5:06 pm - 11:33 pm
PWM
-
STL
31h 27m2 stops
$240Multiple Airlines
Tue, Jan 27 - Mon, Feb 2
Multiple Airlines Logo
5:42 pm - 10:22 am
STL
-
PWM
15h 40m1 stop
Multiple Airlines Logo
9:47 am - 11:33 pm
PWM
-
STL
14h 46m1 stop
$253Multiple Airlines
Mon, Jan 26 - Mon, Feb 2
Multiple Airlines Logo
8:22 pm - 10:22 am
STL
-
PWM
37h 00m2 stops
Multiple Airlines Logo
9:47 am - 11:33 pm
PWM
-
STL
14h 46m1 stop
$319Multiple Airlines
Tue, Jan 27 - Mon, Feb 2
Delta Logo
10:19 am - 10:27 pm
STL
-
PWM
11h 08m2 stops
Delta Logo
6:00 am - 2:49 pm
PWM
-
STL
9h 49m2 stops
$327Delta
Mon, Jan 26 - Mon, Feb 2
United Airlines Logo
8:30 am - 2:31 pm
STL
-
PWM
5h 01m1 stop
United Airlines Logo
7:27 pm - 11:59 pm
PWM
-
STL
5h 32m1 stop
$335United Airlines
Sun, Jan 11 - Mon, Feb 2
Multiple Airlines Logo
5:11 pm - 9:07 am
STL
-
PWM
14h 56m1 stop
Multiple Airlines Logo
5:06 pm - 11:33 pm
PWM
-
STL
31h 27m2 stops
$337Multiple Airlines
Mon, Jan 26 - Mon, Feb 2
Delta Logo
11:23 am - 11:22 pm
STL
-
PWM
10h 59m2 stops
Delta Logo
12:10 pm - 8:37 pm
PWM
-
STL
9h 27m2 stops
$345Delta
Sun, Jan 11 - Mon, Feb 2
Multiple Airlines Logo
5:11 pm - 9:07 am
STL
-
PWM
14h 56m1 stop
Multiple Airlines Logo
9:47 am - 11:33 pm
PWM
-
STL
14h 46m1 stop
$354Multiple Airlines
Thu, Jan 15 - Sun, Jan 18
United Airlines Logo
8:30 am - 2:31 pm
STL
-
PWM
5h 01m1 stop
United Airlines Logo
4:10 pm - 9:13 pm
PWM
-
STL
6h 03m1 stop
$384United Airlines
Sat, Jan 17 - Tue, Jan 20
United Airlines Logo
8:05 am - 2:39 pm
STL
-
PWM
5h 34m1 stop
United Airlines Logo
7:27 pm - 11:59 pm
PWM
-
STL
5h 32m1 stop
$388United Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Portland flights

Get data-powered insights and trends into flights from St. Louis to Portland to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Portland is February, where tickets cost $384 (return) on average. On the other hand, the most expensive months are January and August, where the average cost of round-trip tickets is $529 and $481 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Portland, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Portland, you should book around 4 weeks before departure, which saves you about 50% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$240
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from St. Louis to Portland

When to book flights from St. Louis to Portland

Are your dates flexible? Find out the best times to travel from St. Louis to Portland based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Portland

  • What is the cheapest flight from St. Louis to Portland?

    In the last 3 days, the lowest price for a flight from St. Louis to Portland was $141 for a one-way ticket and $240 for a round-trip.

  • Do I need a passport to fly between St. Louis and Portland?

    No

  • Which airports will I be using when flying from St. Louis to Portland?

    St. Louis and Portland are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Portland.

  • Which aircraft models fly most regularly from St. Louis to Portland?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Portland?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Portland, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Portland, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Portland are Southwest and Delta. With an average price for the route of $512 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $394 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from St. Louis to Portland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Portland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PWM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Portland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from St. Louis to Portland

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Portland. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Portland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4252 reviews
8.0Comfort
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
Airline reviews

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

10.0 ExcellentAnonymous, Dec 2025
DAL - CHS
Read more Southwest reviews

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Flight was on time. Wi-fi was a little spotty/slow. Boarding and exit were efficient.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Did not realize internet screen was hidden between seats and no info printed!!!!

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Very good flight crew and very nice people staff were incredible especially the gate agent

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

The flight was delayed for about 2 hrs. Other than it, it was good.

Advertised fruit trays with cheese, but only snacks handed out!

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

Flight delays both to Detroits and return flight . The flight to Detroit was associated with mechanical difficulty

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

Wasn't a Delta issue I don't think, but seems there was a Delta flight at each of the 2 Dallas airports at the same exact time, both to Atlanta. I was evidently booked on the one at Love Airport, but the Carey transport shuttle took me to DFW instead and I ended up missing the flight by just a few minutes. Was able to book a Southwest flight from Love Airport, but was a big loss of time and an inconvenience.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

They did the one thing that really matters - got to Chicago early.

I liked the snacks and the flight attendants were friendly.

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

Flight was late - I was downgraded from first class to coach

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

We were 4+ hours delayed. AA is absolutely obnoxious. They just kept pushing back the time to the point where we did not get into Vegas until after midnight when we were supposed to arrive like 845pm.

My last flight on 25 Dec, it’s Christmas Day, everyone happy and very good mood. I really enjoy traveling with Americans Airlines from Miami to Minneapolis my home town after long flight from lhe to Doha then Miami. Thank you again to make my travels comfortable and relaxed. Best regards

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

WiFi didn’t work the entire flight. Very disappointing. Minimal food and options - sadly the state of current affairs. All other aspects of the flight were fine.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

The pilot greased the landing and the crew was fantastic.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

delayed due to weather. Could not communicate with family since the wifi was broken

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

Information on your arrival and departure airports