$114 Cheap Alaska Airlines flights St. Louis (STL) to Portland (PDX)

View $114 flight on Tue, Sep 30, 2025Opens in a new window

$114 Cheap Alaska Airlines flights St. Louis (STL) to Portland (PDX)

Prices were available within the past 7 days and start at $114 for one-way flights and $228 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Sep 23 - Fri, Sep 26
STL
St. Louis
PDX
Portland
$228 Roundtrip, found 3 days ago
$228
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Sep 23 from St. Louis to Portland, returning Fri, Sep 26, priced at $228 found 3 days ago
Alaska Airlines
Mon, Dec 8 - Fri, Dec 12
STL
St. Louis
PDX
Portland
$230 Roundtrip, found 4 hours ago
$230
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Mon, Dec 8 from St. Louis to Portland, returning Fri, Dec 12, priced at $230 found 4 hours ago
Alaska Airlines
Tue, Sep 30 - Mon, Oct 6
STL
St. Louis
PDX
Portland
$232 Roundtrip, just found
$232
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Sep 30 from St. Louis to Portland, returning Mon, Oct 6, priced at $232 just found
Alaska Airlines
Tue, Sep 30 - Sat, Oct 11
STL
St. Louis
PDX
Portland
$241 Roundtrip, found 2 days ago
$241
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Sep 30 from St. Louis to Portland, returning Sat, Oct 11, priced at $241 found 2 days ago
Alaska Airlines
Sat, Nov 15 - Tue, Nov 18
STL
St. Louis
PDX
Portland
$251 Roundtrip, just found
$251
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Nov 15 from St. Louis to Portland, returning Tue, Nov 18, priced at $251 just found
Flights from St. Louis (STL) to Portland (PDX)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
1703 mi
Average flight time
4 hours 7 mins

Frequently asked questions

How much is an Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Portland Intl. Airport (PDX)?
Grab cheap round-trip Alaska Airlines flights from $228 from STL to PDX by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from $114 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to PDX with Alaska Airlines?
Search for return or one-way flights to Portland in January or December. You could find lower fares with Alaska Airlines during these off-peak times.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Portland Intl. Airport (PDX) with Alaska Airlines?
Look for affordable Alaska Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Portland Intl. Airport (PDX) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Alaska Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Portland Intl. Airport (PDX)?
Enter your dates, hit search and tick the "Nonstop" filter on Expedia to browse any direct flights from STL to PDX with Alaska Airlines or another carrier.
What is the earliest Alaska Airlines flight from STL to PDX?
Search Alaska Airlines's earliest flights from STL to PDX by selecting our "Morning" and "Early Morning" filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Alaska Airlines fly into in Portland?
Alaska Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Portland come in to Portland Intl. Airport (PDX). This is the main gateway to this city.
Why fly with Alaska Airlines from STL to PDX?
Offering top-tier customer service and an excellent in-flight experience, Alaska Airlines is a top choice for many travelers flying from STL to PDX. What's more, if you're a Mileage Plan and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Portland Intl. Airport (PDX)?
Changes are generally free within 24 hours of making your booking, but your airline may add a charge after that. For more details about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to change your itinerary without additional charges, apply the "Changes included" or "No cancel fee" filter when planning your next getaway.

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*Available to One Key members.