$151 Cheap Flights from Walla Walla (ALW) to St. Louis (STL)

View $151 flight on Wed, Sep 3, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $151 for one-way flights and $322 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Sep 4 - Tue, Sep 16
ALW
Walla Walla
STL
St. Louis
$322 Roundtrip, found 6 days ago
$322
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Sep 4 from Walla Walla to St. Louis, returning Tue, Sep 16, priced at $322 found 6 days ago
Flights from Walla Walla (ALW) to St. Louis (STL)
Origin airport
Walla Walla Regional
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$322
Distance
1502 mi

Walla Walla to St. Louis Flights

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

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 Walla Walla to St. Louis are during the month of September. You can find some of the cheapest flights from Walla Walla to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Walla Walla to St. Louis: 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 Walla Walla to St. Louis

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 Walla Walla to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $151 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 Walla Walla to St. Louis 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 Walla Walla to St. Louis 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.

 

Frequently asked questions

How much does a flight from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $151 or cheap return flight from $322 from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for September may help you find better deals, as it's the cheapest month for flights between ALW and STL. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from ALW to STL. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily nonstop flights available from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from ALW to STL?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary 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 Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL)?
To arrive at Lambert-St. Louis Intl. Airport (STL) on schedule, opt for a flight that leaves Walla Walla Regional Airport (ALW) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from ALW to STL just before your trip is generally more expensive. But if there's some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book an ALW to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking an ALW to STL flight and hotel package with Expedia could result in significant savings. What's more, having everything in one place takes the hassle out of planning your trip. Simply secure your flights and select from our extensive range of stays, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Walla Walla Regional Airport (ALW) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your ALW to STL flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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