£111 Cheap Flights from Portland (PDX) to St. Louis (STL)

View £111 flight on Fri, 26 Sep 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from Portland (PDX) to St. Louis (STL)

Prices were available within the past 7 days and start at £111 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Portland (PDX) to St. Louis (STL)

September is typically the cheapest month to fly

From £87 - £227 per traveller.

Graph displaying average flight prices per month

Flight from Portland to St. Louis route information
Origin airport
Portland Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
2725 km
Average flight time
3 hours 40 mins

Compare flights from Portland to St. Louis easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Portland to St. Louis. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Portland Intl. to Lambert-St. Louis Intl..  

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 Portland Intl. (PDX) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from Portland to St. Louis 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 Portland Intl. to Lambert-St. Louis Intl. 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 Portland and St. Louis
  • 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 Portland to St. Louis flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Portland Intl. to Lambert-St. Louis Intl. 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.  

Frequently asked questions

How much is a flight from PDX Airport to Lambert-St. Louis Intl. Airport (STL)?
The lowest price advertised for a round-trip journey from Portland Intl. Airport (PDX) to STL is . But you better move fast. This figure is taken from fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from PDX Airport to Lambert-St. Louis Intl. Airport (STL)?
Every airline has its own set of terms and conditions. If you decide to cancel your trip, head to our Customer Service Portal.
How do I find cheap flights from PDX Airport to STL 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 PDX Airport to St. Louis Lambert International Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from PDX Airport to St. Louis Lambert International Airport?
The flight distance between Portland Airport and Lambert-St. Louis Intl. Airport (STL) is 2,700 kilometres. Sneak in a nap or make a start on the latest bestseller and the journey will whiz by.
Which airlines fly direct from PDX to Lambert-St. Louis Intl. Airport (STL)?
If you want to fly straight from PDX to Lambert Field, you'll need to book a flight with one or more stops. Unfortunately, there are no airlines that fly directly on this route.
Are PDX to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally pick up a bargain, with some of the cheapest airfares from PDX to Lambert Field surfacing a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals frequently --- as early as a year in advance in some cases. It depends on the carrier though, as not all airlines advertise prices so far in advance.

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