$157 Cheap Flights from St. Louis (STL) to Walla Walla (ALW)

View $157 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Walla Walla, WA (ALW-Walla Walla Regional)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from St. Louis to Walla Walla (STL-ALW)

Prices were available within the past 7 days and start at $157 for one-way flights and $362 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$362 Roundtrip, found 6 days ago
$362
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $362 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$413 Roundtrip, found 6 days ago
$413
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $413 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$505 Roundtrip, found 6 days ago
$505
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $505 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$508 Roundtrip, found 6 days ago
$508
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $508 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$558 Roundtrip, found 6 days ago
$558
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $558 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$578 Roundtrip, found 6 days ago
$578
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $578 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$658 Roundtrip, found 6 days ago
$658
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $658 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$678 Roundtrip, found 6 days ago
$678
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $678 found 6 days ago
Alaska Airlines
Thu, Nov 13 - Sun, Nov 16
STL
St. Louis
ALW
Walla Walla
$779 Roundtrip, found 6 days ago
$779
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to Walla Walla, returning Sun, Nov 16, priced at $779 found 6 days ago
American Airlines
Thu, Oct 16 - Sun, Oct 19
STL
St. Louis
ALW
Walla Walla
$917 Roundtrip, found 6 days ago
$917
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 16 from St. Louis to Walla Walla, returning Sun, Oct 19, priced at $917 found 6 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW) cost?
Grab a cheap one-way flight from $157 or cheap return flight from $362 from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW)?
The cheapest month to fly from STL to ALW is November, when demand is low. Off-peak months are typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW)?
To find the cheapest airline that'll fly you from STL to ALW, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to ALW?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW) last-minute?
Booking your ticket from STL to ALW shortly before your getaway is generally more expensive. However, if you're flexible with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a STL to ALW flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to ALW flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the hassle out of planning your trip. Simply secure your flights and choose from our extensive range of stays, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Walla Walla Regional Airport (ALW)?
In most cases, you can cancel or reschedule your STL to ALW flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Walla Walla Regional
Roundtrip price
$362
Distance
1502 mi

Book with confidence

St. Louis to Walla Walla Flights

The cheapest times to fly from St. Louis to Walla Walla

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Walla Walla are during the month of November. You can find some of the cheapest flights from St. Louis to Walla Walla with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Walla Walla

Sunday is one of the best days to book for cheap flights from St. Louis to Walla Walla: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Walla Walla

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Walla Walla in 2025. You can also book with separate airlines for your outbound and return journeys, from $157 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Walla Walla flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Walla Walla airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Walla Walla Flights

Explore a world of travel with Expedia

*Available to One Key members.