£107 Cheap Flights from St. Louis (STL) to Portland (PDX)

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

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

Prices were available within the past 7 days and start at £107 for one-way flights and £304 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 12 Jun - Fri, 19 Jun
STL
St. Louis
PDX
Portland
£304 Return, found 6 days ago
£304
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Fri, 19 Jun, priced at £304 found 6 days ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STL
St. Louis
PDX
Portland
£320 Return, found 6 days ago
£320
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from St. Louis to Portland, returning Wed, 24 Jun, priced at £320 found 6 days ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STL
St. Louis
PDX
Portland
£326 Return, found 6 days ago
£326
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from St. Louis to Portland, returning Wed, 24 Jun, priced at £326 found 6 days ago
Alaska Airlines
Fri, 12 Jun - Fri, 19 Jun
STL
St. Louis
PDX
Portland
£333 Return, found 6 days ago
£333
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Fri, 19 Jun, priced at £333 found 6 days ago
Alaska Airlines
Fri, 12 Jun - Fri, 19 Jun
STL
St. Louis
PDX
Portland
£333 Return, found 6 days ago
£333
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Fri, 19 Jun, priced at £333 found 6 days ago
Alaska Airlines
Fri, 12 Jun - Mon, 22 Jun
STL
St. Louis
PDX
Portland
£342 Return, found 3 days ago
£342
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Mon, 22 Jun, priced at £342 found 3 days ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STL
St. Louis
PDX
Portland
£356 Return, found 6 days ago
£356
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from St. Louis to Portland, returning Wed, 24 Jun, priced at £356 found 6 days ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STL
St. Louis
PDX
Portland
£357 Return, found 6 days ago
£357
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from St. Louis to Portland, returning Wed, 24 Jun, priced at £357 found 6 days ago
Alaska Airlines
Fri, 12 Jun - Fri, 19 Jun
STL
St. Louis
PDX
Portland
£361 Return, found 6 days ago
£361
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Fri, 19 Jun, priced at £361 found 6 days ago
Alaska Airlines
Fri, 12 Jun - Fri, 19 Jun
STL
St. Louis
PDX
Portland
£362 Return, found 6 days ago
£362
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 12 Jun from St. Louis to Portland, returning Fri, 19 Jun, priced at £362 found 6 days ago

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) cost?
One-way flights typically cost between £272 and £851 and return flights often range between £272 and £851. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
September is typically the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.), with average return fares of approximately £260. This is about 16% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) include January and April.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
Enter STL to PDX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Portland, OR (PDX-Portland Intl.) (PDX) will differ from traveller to traveller. If you like to fly early, AS offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN offers the most daily flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Portland, OR (PDX-Portland Intl.) (PDX), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
When looking for the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Portland, OR (PDX-Portland Intl.) (PDX), you'll find that September and January are typically the cheapest months, with average prices around £260. While March is a popular month for travel, offering plenty of flight options, it's not one of the cheapest. For the best value, consider flying in September or January to save on your fare, based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
There are approximately 93 connecting flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.). Some common connection points include O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA), and Denver Intl. (DEN).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Portland, OR (PDX-Portland Intl.) (PDX) typically departs at approximately 5:00 AM local time. This service is operated by American Airlines and is a seasonal service active in May and June. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
You'll find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) on a Friday, with around 68 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, United Airlines, and American Airlines. Flight options are notably more plentiful on Fridays compared to other days of the week.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Portland, OR (PDX-Portland Intl.) (PDX) are in the early morning, from 6am to 9am. Approximately 28% of passengers prefer this time window. Many major carriers, including American Airlines, Southwest Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive in Portland with plenty of time to settle in.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
A nonstop flight from STL to PDX typically takes around 4 hours, covering approximately 1,704 miles. Connecting flights on this route usually add 3 hours 50 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
Select the "Business class" and "First class" filters when looking for STL to PDX flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Portland from Lambert-St. Louis Intl. (STL)?
When traveling from Lambert-St. Louis Intl. (STL) to Portland, you can fly into Portland Intl. (PDX) and Portland Intl. Jetport (PWM). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD), Denver Intl. (DEN) before reaching Portland. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Portland, OR (PDX-Portland Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Portland Intl.
Return price
£304
Distance
2725 km
Average flight time
5 hours 29 mins

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, 20 airlines cover the route. And fly direct, getting you to Portland Intl. 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..  

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. (PDX)

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. start at just £304 and range up to £362.  

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 June, 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. 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.  

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

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*Available to Expedia members.