What is the cheapest airline to fly from St. Louis to West Yellowstone round-trip?

United Airlines, at $505, was found to be the cheapest airline from St. Louis to West Yellowstone..

What is the cheapest day to fly from St. Louis to West Yellowstone?

Travelers seeking maximum savings on their St. Louis to West Yellowstone flight should consider departing on Friday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to West Yellowstone?

Flights from St. Louis to West Yellowstone are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to West Yellowstone.

What is the cheapest time of day to fly from STL to WYS?

When flying from St. Louis to West Yellowstone, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from St. Louis to West Yellowstone that include hotel bookings?

Yes. In addition to deals on St. Louis to West Yellowstone flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to West Yellowstone?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to West Yellowstone.

Can I find deals for business class flights from St. Louis to West Yellowstone?

Yes. Cheapflights offers flight deals from St. Louis to West Yellowstone by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$505+ Flights from St. Louis to West Yellowstone

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Cheap flight deals from St. Louis to West Yellowstone

Round-trip from	$505 (United Airlines)

From Lambert-St Louis to West Yellowstone

Search Deals

Find flight deals from St. Louis to West Yellowstone

Cheapest flights from St. Louis to West Yellowstone
Explore the most affordable flight options available from St. Louis to West Yellowstone. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Fri 8/158:54 amSTL - WYS

1 stop25h 43mUnited Airlines

Sat 8/2310:15 amWYS - STL

1 stop5h 18mUnited Airlines

Deal found 6/10

$505

Best flights from St. Louis to West Yellowstone
Discover carefully curated flight deals from St. Louis to West Yellowstone that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Fri 8/158:54 amSTL - WYS

1 stop25h 43mUnited Airlines

Sat 8/2310:15 amWYS - STL

1 stop5h 18mUnited Airlines

Deal found 6/10

$505

Last-minute flights from St. Louis to West Yellowstone
Discover last-minute flight deals from St. Louis to West Yellowstone. Data last updated June 12, 2025 and is based on user searches.

Tue 6/179:10 amSTL - WYS

1 stop5h 08mUnited Airlines

Tue 6/241:56 pmWYS - STL

1 stop5h 52mUnited Airlines

Deal found 6/11

$970

Thu 6/265:15 amSTL - WYS

1 stop9h 05mUnited Airlines

Mon 6/302:02 pmWYS - STL

1 stop6h 48mUnited Airlines

Deal found 6/10

$681

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to West Yellowstone that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisWest Yellowstone

STL - WYS

STLWYS

Lambert-St Louis

Fri 8/15

8:54 am-9:37 am

1 stop25h 43m

West Yellowstone

Sat 8/23

10:15 am-4:33 pm

1 stop5h 18m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from St. Louis to West Yellowstone

Have a flexible travel schedule? Discover the best time to fly to West Yellowstone from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to West Yellowstone

Rainfall in West Yellowstone by month

In terms of precipitation, rainfall in West Yellowstone ranges from 1.2 - 2.0 inches per month. January is typically the wettest month, when rainfall can reach 2.0 in. April is typically the driest time to visit West Yellowstone when rainfall is around 1.2 in.

Temperature in West Yellowstone by month

If weather is an important factor for your trip to West Yellowstone, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 15.8 F).

Reviews of airlines servicing West Yellowstone

United Airlines

7.4

Good

8,790 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,790 reviews

United Airlines

7.4

Good

8,790 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

What is the cheapest airline to fly from St. Louis to West Yellowstone round-trip?
United Airlines, at $505, was found to be the cheapest airline from St. Louis to West Yellowstone..
Can I find deals for flights from St. Louis to West Yellowstone that include hotel bookings?
Yes. In addition to deals on St. Louis to West Yellowstone flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to West Yellowstone?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to West Yellowstone.
Can I find deals for business class flights from St. Louis to West Yellowstone?
Yes. Cheapflights offers flight deals from St. Louis to West Yellowstone by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 2 airlines flying from St. Louis to West Yellowstone

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$243	Average$492	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$440	Average$725	FlexibilityNo cancel fee	On-time69%

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$505+ Cheap flights from St. Louis to West Yellowstone (STL - WYS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.

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2. Select your favorite providers

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Cheap flight deals from St. Louis to West Yellowstone

Round-trip from

Find flight deals from St. Louis to West Yellowstone

Cheapest flights from St. Louis to West YellowstoneExplore the most affordable flight options available from St. Louis to West Yellowstone. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from St. Louis to West Yellowstone. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to West Yellowstone that are best for you.

Best time to book a flight from St. Louis to West Yellowstone

Have a flexible travel schedule? Discover the best time to fly to West Yellowstone from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to West Yellowstone

Rainfall in West Yellowstone by month

Plan your trip to West Yellowstone by taking into account the average rainfall totals by month.

Temperature in West Yellowstone by month

Plan your trip to West Yellowstone by taking into account the average temperature totals by month.

Reviews of airlines servicing West Yellowstone

Related info for your journey

Find useful and relevant information for your journey from St. Louis to West Yellowstone. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from St. Louis to West Yellowstone round-trip?

Can I find deals for flights from St. Louis to West Yellowstone that include hotel bookings?

How can I find direct flights from St. Louis to West Yellowstone?

Can I find deals for business class flights from St. Louis to West Yellowstone?

Traveling to a place near St. Louis?

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Alternative routes for St. Louis to West Yellowstone

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Top 2 airlines flying from St. Louis to West Yellowstone

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Cheapest flights from St. Louis to West Yellowstone
Explore the most affordable flight options available from St. Louis to West Yellowstone. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.