$218 Cheap Flights from St. Louis (STL) to Yakima (YKM)

View $218 flight on Sun, Aug 17, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Yakima, WA (YKM-Yakima Air Terminal - McAllister Field)

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Cheap Flights from St. Louis to Yakima (STL-YKM)

Prices were available within the past 7 days and start at $218 for one-way flights and $363 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Aug 14 - Wed, Aug 20
STL
St. Louis
YKM
Yakima
$363 Roundtrip, found 2 days ago
$363
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Aug 14 from St. Louis to Yakima, returning Wed, Aug 20, priced at $363 found 2 days ago
Alaska Airlines
Thu, Jul 31 - Sat, Aug 2
STL
St. Louis
YKM
Yakima
$467 Roundtrip, found 5 days ago
$467
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Jul 31 from St. Louis to Yakima, returning Sat, Aug 2, priced at $467 found 5 days ago
Alaska Airlines
Tue, Apr 28 - Wed, May 13
STL
St. Louis
YKM
Yakima
$484 Roundtrip, found 20 hours ago
$484
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Tue, Apr 28 from St. Louis to Yakima, returning Wed, May 13, priced at $484 found 20 hours ago
Alaska Airlines
Tue, Apr 28 - Wed, May 13
STL
St. Louis
YKM
Yakima
$511 Roundtrip, found 20 hours ago
$511
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Tue, Apr 28 from St. Louis to Yakima, returning Wed, May 13, priced at $511 found 20 hours ago
Alaska Airlines
Thu, Jul 31 - Sat, Aug 2
STL
St. Louis
YKM
Yakima
$522 Roundtrip, found 5 days ago
$522
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Jul 31 from St. Louis to Yakima, returning Sat, Aug 2, priced at $522 found 5 days ago
Alaska Airlines
Fri, May 1 - Sat, May 16
STL
St. Louis
YKM
Yakima
$524 Roundtrip, found 20 hours ago
$524
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Fri, May 1 from St. Louis to Yakima, returning Sat, May 16, priced at $524 found 20 hours ago
Alaska Airlines
Thu, Jul 31 - Sat, Aug 2
STL
St. Louis
YKM
Yakima
$527 Roundtrip, found 5 days ago
$527
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Jul 31 from St. Louis to Yakima, returning Sat, Aug 2, priced at $527 found 5 days ago
Alaska Airlines
Fri, May 1 - Fri, May 8
STL
St. Louis
YKM
Yakima
$538 Roundtrip, found 20 hours ago
$538
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Fri, May 1 from St. Louis to Yakima, returning Fri, May 8, priced at $538 found 20 hours ago
Alaska Airlines
Fri, May 1 - Fri, May 8
STL
St. Louis
YKM
Yakima
$551 Roundtrip, found 20 hours ago
$551
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Fri, May 1 from St. Louis to Yakima, returning Fri, May 8, priced at $551 found 20 hours ago
American Airlines
Tue, Apr 28 - Wed, May 13
STL
St. Louis
YKM
Yakima
$617 Roundtrip, found 20 hours ago
$617
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Tue, Apr 28 from St. Louis to Yakima, returning Wed, May 13, priced at $617 found 20 hours ago
Flights from St. Louis (STL) to Yakima (YKM)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Yakima Air Terminal - McAllister Field
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
$362
Distance
1613 mi

St. Louis to Yakima Flights

The cheapest times to fly from St. Louis to Yakima

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

 

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

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

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 Yakima in 2025. You can also book with separate airlines for your outbound and return journeys, from $218 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 Yakima 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 Yakima 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 Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM) cost?
Discover the latest flight deals from STL to YKM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to YKM?
The cheapest flights from STL to YKM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to YKM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to YKM. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to YKM?
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 Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM)?
To reach Yakima Air Terminal - McAllister Field Airport (YKM) on schedule, pick a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood 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 Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM) last-minute?
Booking your plane ticket from STL to YKM right before your journey is usually more expensive. However, if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a STL to YKM flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to YKM flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the stress out of planning your trip. Simply pick your flights and select from our extensive range of stays, then personalize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Yakima Air Terminal - McAllister Field Airport (YKM)?
It's generally possible to reschedule or cancel your STL to YKM flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.