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240 € Cheap Flights from St Louis to Portland

Compare St Louis to Portland flight deals

Find the cheapest month or even day of the year to fly to Portland

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Flight deals from St Louis to Portland

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Portland Airport? If you want to travel next month, return fares start from 267 €. Find the lowest prices on one-way and return tickets right here.
Portland.240 € per passenger.Departing Fri, 13 Nov, returning Tue, 17 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Fri, 13 Nov, arriving in Portland.Inbound indirect flight with Southwest Airlines, departs from Portland on Tue, 17 Nov, arriving in St Louis.Price includes taxes and charges.From 240 €, select.
Portland.267 € per passenger.Departing Thu, 20 Aug, returning Mon, 24 Aug.Return flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 20 Aug, arriving in Portland.Inbound indirect flight with Breeze Airways, departs from Portland on Mon, 24 Aug, arriving in St Louis.Price includes taxes and charges.From 267 €, select.
Portland.282 € per passenger.Departing Fri, 2 Oct, returning Tue, 6 Oct.Return flight with Frontier Airlines and jetBlue.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 2 Oct, arriving in Portland.Inbound indirect flight with jetBlue, departs from Portland on Tue, 6 Oct, arriving in St Louis.Price includes taxes and charges.From 282 €, select.
Portland.310 € per passenger.Departing Thu, 10 Sep, returning Mon, 14 Sep.Return flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 10 Sep, arriving in Portland.Inbound indirect flight with Breeze Airways, departs from Portland on Mon, 14 Sep, arriving in St Louis.Price includes taxes and charges.From 310 €, select.
Portland.367 € per passenger.Departing Fri, 28 Aug, returning Mon, 7 Sep.Return flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 28 Aug, arriving in Portland.Inbound indirect flight with Breeze Airways, departs from Portland on Mon, 7 Sep, arriving in St Louis.Price includes taxes and charges.From 367 €, select.
Portland.450 € per passenger.Departing Fri, 31 Jul, returning Tue, 4 Aug.Return flight with Frontier Airlines and jetBlue.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 31 Jul, arriving in Portland.Inbound indirect flight with jetBlue, departs from Portland on Tue, 4 Aug, arriving in St Louis.Price includes taxes and charges.From 450 €, select.
Portland.492 € per passenger.Departing Fri, 18 Dec, returning Sun, 27 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Fri, 18 Dec, arriving in Portland.Inbound indirect flight with Southwest Airlines, departs from Portland on Sun, 27 Dec, arriving in St Louis.Price includes taxes and charges.From 492 €, select.
Portland.564 € per passenger.Departing Mon, 27 Jul, returning Thu, 30 Jul.Return flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departs from St Louis on Mon, 27 Jul, arriving in Portland.Inbound indirect flight with Breeze Airways, departs from Portland on Thu, 30 Jul, arriving in St Louis.Price includes taxes and charges.From 564 €, select.

Find the cheapest month to fly from St Louis to Portland

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Portland flights are currently cheapest in November.
Jul
from 564 €
Aug
from 267 €
Sep
from 310 €
Oct
from 282 €
Nov
from 240 €
Dec
from 492 €
Jan
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Feb
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Mar
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Apr
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May
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Jun
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St Louis to Portland: Alternative routes

Compare routes from St Louis to Portland below. You may find an airport to fly into that's cheaper, faster, or easier than Portland.

Portland

4km from central Portland
ClosestCheapest
from 240 €
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Portsmouth

79km from central Portland
from 287 €
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Augusta

82km from central Portland
from 409 €
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St Louis to Portland: Flight information

The things to know before you go.
Cheapest flight found240 €
Cheapest month to flyNovember

Finding cheap flights from St Louis to Portland: Frequently asked questions

The best price we found for a return flight from St Louis to Portland is 240 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Portland. But we found flights with one or more stops from 240 €.
As of July 2026, there are no flights flying from St Louis to Portland.
The cheapest month to fly from St Louis to Portland is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Portland Airport on Friday, 13 November 2026.
No airlines currently offer direct flights between St Louis Airport and Portland Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Portland but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Portland is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Southwest Airlines offers the cheapest flight tickets to Portland.

Flying from St Louis Airport (STL) to Portland Airport (PWM): what you need to know

  • Arrive at the airport on time so you don't miss your STL to PWM flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • You'll likely experience bigger queues in popular months such as July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will help ensure a smooth travel experience.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from St Louis Airport to Portland Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to visit your chosen city. Some great stopovers between STL and PWM include:

    • Detroit Wayne County Airport

    • Washington Ronald Reagan Airport

    • Baltimore Washington International Airport

Handy information about St Louis Airport (STL)

Arriving at Portland Airport (PWM)

When to fly to Portland Airport (PWM)

  • Before locking in your flights from St Louis Airport to Portland Airport, think about which time of year is best for you. High season in Portland offers a bustling atmosphere and lots to do, while low season means you'll get cheaper hotel rates and smaller crowds.

  • Before locking in your flight from St Louis Airport to Portland Airport, consider the kind of weather you like. July is the warmest month in Portland, with temperatures ranging from 14ºC (57ºF) to 25ºC (77ºF).

  • For cooler conditions, search for a cheap ticket from STL to PWM in January. Average temperatures are between -10ºC (14ºF) and 3ºC (37ºF) then.

Explore more of the United States

  • Portland is easy to fall in love with, but there are so many other corners of the United States you'll want to see. About 451 kilometres south-west of Portland, a trip to New York will keep you on the move. Start with popular sights like Central Park, Statue of Liberty and Metropolitan Museum of Art.

  • Boston is another favourite destination in the United States and is around 161 kilometres south-west of Portland. No journey is complete without experiencing Museum of Fine Arts Boston, Freedom Trail and USS Constitution Museum.

Plan the rest of your trip from St Louis to Portland

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.