$163 Cheap Flights from Yakima (YKM) to St. Louis (STL)

View $163 flight on Wed, May 14, 2025Opens in a new window

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

Prices were available within the past 7 days and start at $163 for one-way flights and $336 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Tue, Jun 10 - Sat, Jun 14
YKM
Yakima
STL
St. Louis
$336 Roundtrip, found 5 days ago
$336
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Jun 10 from Yakima to St. Louis, returning Sat, Jun 14, priced at $336 found 5 days ago
Hawaiian Airlines
Tue, Jun 10 - Tue, Jun 10
YKM
Yakima
STL
St. Louis
$346 Roundtrip, found 5 days ago
$346
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Jun 10 from Yakima to St. Louis, returning Tue, Jun 10, priced at $346 found 5 days ago
Hawaiian Airlines
Sat, May 24 - Mon, Jun 9
YKM
Yakima
STL
St. Louis
$364 Roundtrip, found 6 days ago
$364
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, May 24 from Yakima to St. Louis, returning Mon, Jun 9, priced at $364 found 6 days ago
Hawaiian Airlines
Mon, Jun 9 - Sat, Jun 14
YKM
Yakima
STL
St. Louis
$374 Roundtrip, found 5 days ago
$374
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Mon, Jun 9 from Yakima to St. Louis, returning Sat, Jun 14, priced at $374 found 5 days ago
Hawaiian Airlines
Sat, Jun 7 - Sat, Jun 14
YKM
Yakima
STL
St. Louis
$382 Roundtrip, found 5 days ago
$382
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Sat, Jun 7 from Yakima to St. Louis, returning Sat, Jun 14, priced at $382 found 5 days ago
Hawaiian Airlines
Mon, Jun 9 - Tue, Jun 10
YKM
Yakima
STL
St. Louis
$384 Roundtrip, found 5 days ago
$384
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Mon, Jun 9 from Yakima to St. Louis, returning Tue, Jun 10, priced at $384 found 5 days ago
Hawaiian Airlines
Tue, Jun 10 - Tue, Jun 24
YKM
Yakima
STL
St. Louis
$386 Roundtrip, found 5 days ago
$386
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Jun 10 from Yakima to St. Louis, returning Tue, Jun 24, priced at $386 found 5 days ago
Hawaiian Airlines
Tue, Jun 10 - Mon, Jun 23
YKM
Yakima
STL
St. Louis
$391 Roundtrip, found 5 days ago
$391
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Jun 10 from Yakima to St. Louis, returning Mon, Jun 23, priced at $391 found 5 days ago
Alaska Airlines
Tue, Jun 3 - Thu, Jun 5
YKM
Yakima
STL
St. Louis
$392 Roundtrip, found 8 hours ago
$392
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Jun 3 from Yakima to St. Louis, returning Thu, Jun 5, priced at $392 found 8 hours ago
Alaska Airlines
Tue, Jun 3 - Thu, Jun 5
YKM
Yakima
STL
St. Louis
$403 Roundtrip, found 6 days ago
$403
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Jun 3 from Yakima to St. Louis, returning Thu, Jun 5, priced at $403 found 6 days ago
Flights from Yakima (YKM) to St. Louis (STL)
Origin airport
Yakima Air Terminal - McAllister Field
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
$336
Distance
1613 mi

Yakima to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Yakima 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 Yakima 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 Yakima to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $163 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 Yakima 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 Yakima 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 Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from YKM to STL 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 YKM to STL?
The cheapest flights from YKM to STL 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 YKM to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from YKM to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL)?
You’ll have to catch a flight with a layover when traveling from Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL). Direct flights don’t operate daily on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from YKM to STL?
You’ll generally find Tuesday the quietest day for flights, while Fridays tend to be 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 Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Later departures are 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 Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from YKM to STL just before your journey is generally more expensive. However, if there’s some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a YKM to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a YKM to STL flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Just pick your flights and select from our wide range of hotels, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Yakima Air Terminal - McAllister Field Airport (YKM) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your YKM to STL flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond 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 information.

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*Available to One Key members.