Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

STL - PWM

$99 Find cheap flights from St. Louis to Portland

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Portland departing on 9/16. 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
0 bags
Fri 7/12
Fri 7/19

Search 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
In the last 7 days travelers have searched 44,148,666 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
7:33 pm - 11:57 amSTL-PWM
15h 24m1 stop
2:51 pm - 8:43 amPWM-STL
18h 52m1 stop
$181Frontier
Find Deal
Sat, Jul 13 - Tue, Jul 23
9:14 am - 3:11 pmSTL-PWM
4h 57m1 stop
12:21 pm - 5:26 pmPWM-STL
6h 05m1 stop
$198American Airlines
Find Deal
Mon, Sep 16 - Mon, Sep 23
7:03 am - 3:09 pmSTL-PWM
7h 06m1 stop
6:04 am - 12:15 pmPWM-STL
7h 11m1 stop
$252American Airlines
Find Deal
Mon, Aug 5 - Wed, Aug 14
6:28 pm - 11:38 pmSTL-PWM
4h 10m1 stop
1:07 pm - 9:35 pmPWM-STL
9h 28m1 stop
$266American Airlines
Find Deal
Tue, Oct 15 - Tue, Oct 22
3:49 pm - 10:00 pmSTL-PWM
5h 11m1 stop
5:37 am - 9:14 amPWM-STL
4h 37m1 stop
$291Delta
Find Deal
Thu, Aug 15 - Sun, Aug 18
7:24 pm - 9:09 amSTL-PWM
12h 45m1 stop
1:30 pm - 5:29 pmPWM-STL
28h 59m3 stops
Sun, Jul 14 - Wed, Jul 17
3:49 pm - 10:00 pmSTL-PWM
5h 11m1 stop
7:00 am - 2:19 pmPWM-STL
8h 19m1 stop
$346Delta
Find Deal
Sun, Jul 28 - Sun, Aug 11
10:11 am - 12:50 pmSTL-PWM
25h 39m2 stops
12:00 pm - 8:50 pmPWM-STL
9h 50m1 stop
Tue, Jul 23 - Sat, Jul 27
5:20 pm - 10:31 amSTL-PWM
16h 11m2 stops
7:25 pm - 10:07 amPWM-STL
15h 42m2 stops
$419United Airlines
Find Deal
Mon, Sep 16 - Mon, Sep 23
3:10 pm - 9:33 pmSTL-PWM
5h 23m1 stop
11:35 am - 4:07 pmPWM-STL
5h 32m1 stop
$426United Airlines
Find Deal
Fri, Jul 5 - Wed, Jul 10

Flights from St. Louis to Portland - Travel Insights & Trends

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’s the cheapest day of the week to fly from St. Louis to Portland?

The average price of all flights from St. Louis to Portland clicked on KAYAK for each day over the last 12 months.
For St. Louis to Portland, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Portland back to St. Louis, the best deals are generally found on Wednesday, with Monday being the most expensive.

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 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 January, where tickets cost $276 on average. On the other hand, the most expensive months are March and November, where the average cost of tickets is $606 and $532 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from St. Louis to Portland, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 1 day before departure.

Which airlines provide the cheapest flights from St. Louis to Portland?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on American Airlines ($99) and Delta ($136). The cheapest round-trip tickets were found on Frontier ($181) and American Airlines ($198).

Good to know

Low season

January

High season

October

Cheapest flight

$99
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly and prices are also 0% 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 $99 for a one-way ticket and $181 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?

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Portland are Delta and United Airlines. With an average price for the route of $476 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $560 and an overall rating of 7.4.

  • 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.

See more FAQs

Top 5 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
DeltaOverall score based on 10000 reviews
8.6Crew
7.4Food
8.0Entertainment
7.9Comfort
8.2Boarding
Airline reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

2.0 MediocreCraig, Jun 2024CVG - LGA
Read more about Delta reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

They put me on a chair in between two men, one overweight who was almost falling on top of me, and the other was even uncomfortable because I was half falling because of what the other was pushing me. I stayed with. my feet were swollen from fluid retention and from being unable to accommodate myself. it was very uncomfortable. I asked for help but they told me that the flight was full and they couldn't help me. I got off the plane almost unable to walk due to the inflammation. and then at FLL airport I asked for help because I couldn't go to my next flight, which was a connection.

The walk from baggage claim to the taxi is very difficult for older people I will never fly into JFK again. It is physically challenging

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

The entertainment wasn’t playing in the app or online.

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Paid for premium economy had no tv the whole time the crew tried to reset/reboot but would not work they said they would put a trouble ticket in for it. We had 3 seats my tv was the only one that didn't work. They cancelled our flight re worked us on another that left us at airport over night on the floor I have a ten year old and a 78 diabetic mother which also had shingles and suffers from nerve pain in legs and back. Requested wheelchair service at all airports after the re route NO wheelchair service was there to help. WORST experience we have ever had. Went to American airlines assistance it was closed. I AM FURIOUS!!! I expect some sort of compensation from this traumatic experience and no need for flying points we don't plan on using American airlines again!!!!

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Did not realize seats did not recline. Best to travel in an exit row... No question

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

Four and a half hour delay in total. What frustrates me most is the poor communication and disorganization.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

FRONTIER SUCKS! The agent downstairs tricked me into booking, just to get to the gate. At the gate, they told me they couldn't help. I then called Customer Service. They and the gate attendants kept blaming each other. Neither side was willing to help the customer.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

Book cheap flights from St. Louis to Portland

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Portland found on KAYAK in the last 72 hours.
9/16Mon
1 stopAmerican Airlines
4h 51mSTL-PWM
$99
7/4Thu
1 stopDelta
7h 34mSTL-PWM
$136
7/30Tue
1 stopUnited Airlines
6h 43mSTL-PWM
$193
6/21Fri
1 stopSun Country Air
14h 45mSTL-PWM
$198
6/27Thu
3 stops
22h 42mSTL-PWM
$211
6/27Thu
1 stopAmerican Airlines
5h 59mSTL-PWM
$213
9/16Mon
2 stopsUnited Airlines
29h 39mSTL-PWM
$222
6/28Fri
1 stopAmerican Airlines
5h 11mSTL-PWM
$223
7/4Thu
3 stops
24h 24mSTL-PWM
$224
6/28Fri
3 stops
26h 30mSTL-PWM
$237

Search by stops

Search by airline

Search by price

Last minute flights from St. Louis to Portland

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Portland that are departing in the next 10 days.
6/13Thu
multi-stop
11h 57mSTL-PWM
6/17Mon
multi-stop
21h 51mPWM-STL
$476
6/13Thu
multi-stop
19h 24mSTL-PWM
6/17Mon
multi-stop
21h 51mPWM-STL
$579
6/13Thu
multi-stop
24h 24mSTL-PWM
6/17Mon
multi-stop
21h 51mPWM-STL
$616
6/13Thu
multi-stop
11h 57mSTL-PWM
6/17Mon
multi-stop
19h 44mPWM-STL
$694
6/14Fri
multi-stopAmerican Airlines
8h 50mSTL-PWM
6/17Mon
multi-stopAmerican Airlines
9h 38mPWM-STL
$736
6/13Thu
multi-stopAmerican Airlines
8h 50mSTL-PWM
6/17Mon
multi-stopAmerican Airlines
9h 38mPWM-STL
$791
6/14Fri
multi-stopDelta
10h 35mSTL-PWM
6/17Mon
multi-stopDelta
5h 30mPWM-STL
$860
6/13Thu
multi-stopUnited Airlines
7h 23mSTL-PWM
6/17Mon
multi-stopUnited Airlines
7h 31mPWM-STL
$909
6/14Fri
multi-stopDelta
11h 45mSTL-PWM
6/17Mon
multi-stopDelta
7h 31mPWM-STL
$953
6/14Fri
multi-stopUnited Airlines
8h 28mSTL-PWM
6/17Mon
multi-stopUnited Airlines
7h 31mPWM-STL
$966

Search by stops

Search by airline

Search by price

St. Louis - Portland Flights

Departure:

St. Louis (STL)United States

Destination:

Portland (PWM)United States

Return flight deals:

Portland - St. Louis

Cabin classes: