Title: Cheap Flights from St. Louis to Portland (STL to PWM) - Expedia.co.uk ![Portland, Maine, USA downtown skyline](https://images.trvl-media.com/place/181420/ed709e29-68b6-43b1-967b-35a095561383.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/181420/ed709e29-68b6-43b1-967b-35a095561383.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from St. Louis (STL) to Portland (PWM) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Lambert-St. Louis International Airport (STL) to Portland Intl. Jetport Airport (PWM) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:pwm,departure:30/09/2025TANYT&leg2=from:pwm,to:stl,departure:07/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:pwm,departure:30/09/2025TANYT&leg2=from:pwm,to:stl,departure:07/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:pwm,departure:30/09/2025TANYT&leg2=from:pwm,to:stl,departure:07/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:stl,to:pwm,departure:30/09/2025TANYT&leg2=from:pwm,to:stl,departure:07/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 25% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Find the cheapest month to fly from St. Louis (STL) to Portland (PWM) ### September is typically the cheapest month to fly From £135 - £423 per traveller. ## Frequently asked questions ### How much is a flight from STL to Portland Intl. Jetport Airport (PWM)? > Start packing your bags, because round-trip journeys from St. Louis Lambert International Airport to PWM start from . That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from STL to Portland Intl. Jetport? > We get that things come up unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033) and follow the instructions. ### How do I find cheap flights from STL to PWM that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert Field to Portland Intl. Jetport flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from St. Louis Lambert International Airport to Portland Intl. Jetport Airport (PWM)? > The flying distance from Lambert Field to Portland Intl. Jetport is 1,750 kilometres. Listen to your favourite tunes or make a start on the latest bestseller and the trip will zip by. ### Which airlines fly direct from STL to Portland Intl. Jetport? > You won't find any airlines flying directly between Lambert Field and Portland Intl. Jetport Airport (PWM), so be ready to make at least one stop on your journey. A layover can be a welcome way to break up a trip! ### Are Lambert Field to PWM flight tickets cheaper when they're purchased at the last minute? > Last-minute bookings from St. Louis Lambert International Airport to Portland Intl. Jetport Airport (PWM) can be hit-or-miss. You may be able to find a bargain, but you could also completely miss out! If you'd rather play it safe and start your travel planning ahead of time, Expedia compares flight deals up to 12 months in advance. Just bear in mind that not all airlines release their prices that far in advance. Our top tip? Check back often as prices are updated frequently. ## Travel information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | Portland Intl. Jetport | | Distance | 1749 km | ## Book with confidence ### Compare flights from St. Louis to Portland easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Portland. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Portland Intl. Jetport in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to Portland Intl. Jetport.   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to Portland Intl. Jetport (PWM) The easiest way to view the best deals on flights from St. Louis to Portland today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to Portland Intl. Jetport start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near St. Louis and Portland - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your St. Louis to Portland flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Portland Intl. Jetport for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## Explore a world of travel with Expedia - Trending Routes - Top Flights Destinations - Related Airlines - Cheap Flights from Other Airports - Expedia's Latest Trends ### Top Routes from St. Louis - [St. Louis to Newark Liberty Intl. Airport (STL - EWR)](https://expedia.co.uk/lp/flights/stl/ewr/st-louis-to-newark-liberty-intl-airport) - [St. Louis to Liverpool (STL - LPL)](https://expedia.co.uk/lp/flights/stl/lpl/st-louis-to-liverpool) - [St. Louis to New York (STL - JFK)](https://expedia.co.uk/lp/flights/stl/jfk/st-louis-to-new-york) - [St. Louis to Dubai (STL - DXB)](https://expedia.co.uk/lp/flights/stl/dxb/st-louis-to-dubai) - [St. Louis to London (STL - LHR)](https://expedia.co.uk/lp/flights/stl/lhr/st-louis-to-london) - [St. Louis to Orlando (STL - MCO)](https://expedia.co.uk/lp/flights/stl/mco/st-louis-to-orlando) - [St. Louis to Manchester (STL - MAN)](https://expedia.co.uk/lp/flights/stl/man/st-louis-to-manchester) ### Top Routes to Portland - [Exeter to Portland (EXT - PWM)](https://expedia.co.uk/lp/flights/ext/pwm/exeter-to-portland) - [Washington to Portland (DCA - PWM)](https://expedia.co.uk/lp/flights/dca/pwm/washington-to-portland) - [Edinburgh to Portland (EDI - PWM)](https://expedia.co.uk/lp/flights/edi/pwm/edinburgh-to-portland) - [Washington to Portland (IAD - PWM)](https://expedia.co.uk/lp/flights/iad/pwm/washington-to-portland) - [New York to Portland (JFK - PWM)](https://expedia.co.uk/lp/flights/jfk/pwm/new-york-to-portland) - [London to Portland (LHR - PWM)](https://expedia.co.uk/lp/flights/lhr/pwm/london-to-portland) - [Aberdeen to Portland (ABZ - PWM)](https://expedia.co.uk/lp/flights/abz/pwm/aberdeen-to-portland) - [Pittsburgh to Portland (PIT - PWM)](https://expedia.co.uk/lp/flights/pit/pwm/pittsburgh-to-portland) - [Manchester to Portland (MAN - PWM)](https://expedia.co.uk/lp/flights/man/pwm/manchester-to-portland) ### Top Flight Destinations - [Flights to Las Vegas](https://expedia.co.uk/Cheap-Flights-To-Las-Vegas.d178276.Travel-Guide-Flights) - [Flights to New York](https://expedia.co.uk/Cheap-Flights-To-New-York.d178293.Travel-Guide-Flights) - [Flights to Orlando](https://expedia.co.uk/Cheap-Flights-To-Orlando.d178294.Travel-Guide-Flights) - [Flights to Chicago](https://expedia.co.uk/Cheap-Flights-To-Chicago.d178248.Travel-Guide-Flights) - [Flights to San Diego](https://expedia.co.uk/Cheap-Flights-To-San-Diego.d3073.Travel-Guide-Flights) - [Flights to San Francisco](https://expedia.co.uk/Cheap-Flights-To-San-Francisco.d178305.Travel-Guide-Flights) - [Flights to Los Angeles](https://expedia.co.uk/Cheap-Flights-To-Los-Angeles.d178280.Travel-Guide-Flights) - [Flights to Boston](https://expedia.co.uk/Cheap-Flights-To-Boston.d178239.Travel-Guide-Flights) - [Flights to Miami](https://expedia.co.uk/Cheap-Flights-To-Miami.d178286.Travel-Guide-Flights) - [Flights to Houston](https://expedia.co.uk/Cheap-Flights-To-Houston.d178265.Travel-Guide-Flights) - [Flights to Pigeon Forge](https://expedia.co.uk/Cheap-Flights-To-Pigeon-Forge.d8264.Travel-Guide-Flights) - [Flights to Nashville](https://expedia.co.uk/Cheap-Flights-To-Nashville.d178291.Travel-Guide-Flights) - [Flights to Myrtle Beach](https://expedia.co.uk/Cheap-Flights-To-Myrtle-Beach.d601685.Travel-Guide-Flights) - [Flights to Atlanta](https://expedia.co.uk/Cheap-Flights-To-Atlanta.d178232.Travel-Guide-Flights) - [Flights to San Antonio](https://expedia.co.uk/Cheap-Flights-To-San-Antonio.d178303.Travel-Guide-Flights) - [Flights to Denver](https://expedia.co.uk/Cheap-Flights-To-Denver.d178254.Travel-Guide-Flights) - [Flights to Honolulu](https://expedia.co.uk/Cheap-Flights-To-Honolulu.d1488.Travel-Guide-Flights) - [Flights to Gatlinburg](https://expedia.co.uk/Cheap-Flights-To-Gatlinburg.d7474.Travel-Guide-Flights) - [Flights to Panama City Beach](https://expedia.co.uk/Cheap-Flights-To-Panama-City-Beach.d8021.Travel-Guide-Flights) - [Flights to Atlantic City](https://expedia.co.uk/Cheap-Flights-To-Atlantic-City.d602179.Travel-Guide-Flights) ### Related Airlines - [KLM](https://expedia.co.uk/KLM-Flights.cKL.Travel-Guide-Airlines) - [Virgin Atlantic](https://expedia.co.uk/Virgin-Atlantic-Flights.cVS.Travel-Guide-Airlines) - [Aer Lingus](https://expedia.co.uk/Aer-Lingus-Flights.cEI.Travel-Guide-Airlines) - [Air France](https://expedia.co.uk/Air-France-Flights.cAF.Travel-Guide-Airlines) - [British Airways](https://expedia.co.uk/British-Airways-Flights.cBA.Travel-Guide-Airlines) - [Delta](https://expedia.co.uk/Delta-Flights.cDL.Travel-Guide-Airlines) - [American Airlines](https://expedia.co.uk/American-Airlines-Flights.cAA.Travel-Guide-Airlines) - [Lufthansa](https://expedia.co.uk/Lufthansa-Flights.cLH.Travel-Guide-Airlines) - [Iberia](https://expedia.co.uk/Iberia-Flights.cIB.Travel-Guide-Airlines) - [Air Canada](https://expedia.co.uk/Air-Canada-Flights.cAC.Travel-Guide-Airlines) - [Finnair](https://expedia.co.uk/Finnair-Flights.cAY.Travel-Guide-Airlines) - [United](https://expedia.co.uk/United-Flights.cUA.Travel-Guide-Airlines) - [Austrian Airlines](https://expedia.co.uk/Austrian-Airlines-Flights.cOS.Travel-Guide-Airlines) - [SAS](https://expedia.co.uk/Scandinavian-Airlines-Flights.cSK.Travel-Guide-Airlines) - [Brussels Airlines](https://expedia.co.uk/Brussels-Airlines-Flights.cSN.Travel-Guide-Airlines) - [Alaska Airlines](https://expedia.co.uk/Alaska-Airlines-Flights.cAS.Travel-Guide-Airlines) ### Nearby Airports - [Spirit of St. Louis Airport (SUS)](https://expedia.co.uk/lp/airports/sus/flights-from-spirit-of-st-louis-airport) - [Abraham Lincoln Capital Airport (SPI)](https://expedia.co.uk/lp/airports/spi/flights-from-abraham-lincoln-capital-airport) - [Columbia Regional Airport (COU)](https://expedia.co.uk/lp/airports/cou/flights-from-columbia-regional-airport) - [Williamson County Regional Airport (MWA)](https://expedia.co.uk/lp/airports/mwa/flights-from-williamson-county-regional-airport) - [Decatur Airport (DEC)](https://expedia.co.uk/lp/airports/dec/flights-from-decatur-airport) - [Cape Girardeau Municipal Airport (CGI)](https://expedia.co.uk/lp/airports/cgi/flights-from-cape-girardeau-municipal-airport) - [St. Robert Regional Airport (TBN)](https://expedia.co.uk/lp/airports/tbn/flights-from-st-robert-regional-airport) - [Cairo Regional Airport (CIR)](https://expedia.co.uk/lp/airports/cir/flights-from-cairo-regional-airport) - [Central Illinois Regional Airport (BMI)](https://expedia.co.uk/lp/airports/bmi/flights-from-central-illinois-regional-airport) - [University Of Illinois Urbana-Champaign Williard Airport (CMI)](https://expedia.co.uk/lp/airports/cmi/flights-from-university-of-illinois-urbana-champaign-williard-airport) ### Expedia's Latest Trends Flights - [Flights from London to Boston](https://expedia.co.uk/lp/flights/lhr/bos/london-to-boston) - [Flights from London to Cincinnati](https://expedia.co.uk/lp/flights/lhr/cvg/london-to-cincinnati) - [Flights from London to Seattle](https://expedia.co.uk/lp/flights/lhr/sea/london-to-seattle) - [Flights from Boston to London](https://expedia.co.uk/lp/flights/bos/lhr/boston-to-london) - [Flights from Las Vegas to London](https://expedia.co.uk/lp/flights/las/lhr/las-vegas-to-london) - [Flights from London to Anchorage](https://expedia.co.uk/lp/flights/lhr/anc/london-to-anchorage) - [Flights from London to Philadelphia](https://expedia.co.uk/lp/flights/lhr/phl/london-to-philadelphia) - [Flights from London to Columbus](https://expedia.co.uk/lp/flights/lhr/cmh/london-to-columbus) - [Flights from Manchester to Boston](https://expedia.co.uk/lp/flights/man/bos/manchester-to-boston) - [Flights from Las Vegas to Los Angeles](https://expedia.co.uk/lp/flights/las/lax/las-vegas-to-los-angeles) - [Flights from London to Fort Lauderdale](https://expedia.co.uk/lp/flights/lhr/fll/london-to-fort-lauderdale) - [Flights from London to New York](https://expedia.co.uk/lp/flights/lon/nyc/london-to-new-york) - [Flights from Las Vegas to San Francisco](https://expedia.co.uk/lp/flights/las/sfo/las-vegas-to-san-francisco) - [Flights from London to Cleveland](https://expedia.co.uk/lp/flights/lhr/cle/london-to-cleveland) - [Flights from London to Pittsburgh](https://expedia.co.uk/lp/flights/lhr/pit/london-to-pittsburgh) - [Flights from Toronto to New York](https://expedia.co.uk/lp/flights/yyz/nyc/toronto-to-new-york) - [Flights from Edinburgh to Boston](https://expedia.co.uk/lp/flights/edi/bos/edinburgh-to-boston) - [Flights from Manchester to Las Vegas](https://expedia.co.uk/lp/flights/man/las/manchester-to-las-vegas) - [Flights from Los Angeles to Las Vegas](https://expedia.co.uk/lp/flights/lax/las/los-angeles-to-las-vegas) - [Flights from London to Kansas City](https://expedia.co.uk/lp/flights/lhr/mci/london-to-kansas-city) - [Flights from Dallas to London](https://expedia.co.uk/lp/flights/dfw/lhr/dallas-to-london) - [Flights from Manchester to Dallas](https://expedia.co.uk/lp/flights/man/dfw/manchester-to-dallas) - [Flights from San Francisco to Las Vegas](https://expedia.co.uk/lp/flights/sfo/las/san-francisco-to-las-vegas) - [Flights from New York to Las Vegas](https://expedia.co.uk/lp/flights/jfk/las/new-york-to-las-vegas) - [Flights from London to San Diego](https://expedia.co.uk/lp/flights/lhr/san/london-to-san-diego) - [Flights from Dublin to Las Vegas](https://expedia.co.uk/lp/flights/dub/las/dublin-to-las-vegas) - [Flights from Glasgow to Las Vegas](https://expedia.co.uk/lp/flights/gla/las/glasgow-to-las-vegas) - [Flights from London to Las Vegas](https://expedia.co.uk/lp/flights/lhr/las/london-to-las-vegas) - [Flights from Boston to New York](https://expedia.co.uk/lp/flights/bos/jfk/boston-to-new-york) - [Flights from London to Dallas](https://expedia.co.uk/lp/flights/lhr/dfw/london-to-dallas) \*Available to Expedia members. ![](https://a.travel-assets.com/mad-service/footer/bnaBanners/BEX_Footer.jpg) ## Go further with the Expedia app Save on select hotels when you book in the app. Our app deals help you to save on trips so you can travel more and manage it all on the go. Scan the QR code with your device camera and download our app ![QR code to download the app](https://a.travel-assets.com/mad-service/qr-code/footer_qr/3_QR_FOOTER.png)