$305 Cheap Flights from West Yellowstone (WYS) to St. Louis (STL)

View $305 flight on Mon, Sep 29, 2025Opens in a new window

Popular airlines from West Yellowstone, MT (WYS-Yellowstone) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from West Yellowstone to St. Louis (WYS-STL)

Prices were available within the past 7 days and start at $305 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $305 or cheap return flight from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL)?
is the cheapest month to fly from WYS to STL. Traveling during quieter months is often the key to landing a great deal.
What is the cheapest airline that flies from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from WYS to STL, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily nonstop flights available from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from WYS to STL?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations and delays. 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 Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from WYS to STL just before your getaway is usually more expensive. However, if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a WYS to STL flight and hotel package?
Booking a WYS to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our impressive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Yellowstone Airport (WYS) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to cancel or reschedule your WYS to STL flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you want further information, go to our Customer Service portal.

Travel information

Travel information

Origin airport
Yellowstone
Destination airport
Lambert-St. Louis Intl.
Distance
1141 mi

Book with confidence

Book with confidence

West Yellowstone to St. Louis Flights

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

 

The best time to book a flight from West Yellowstone to St. Louis

Sunday is one of the best days to book for cheap flights from West Yellowstone 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 West Yellowstone 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 West Yellowstone to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $305 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 West Yellowstone 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 West Yellowstone 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.

 

West Yellowstone to St. Louis Flights

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*Available to One Key members.