What are the cheapest airlines flying from St. Louis to West Yellowstone round-trip?

United Airlines, at $485, was found to be the cheapest airline from St. Louis to West Yellowstone. An alternate airline flying to your destination would be Delta.

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.

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.

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).

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.

$119+ Flights from St. Louis to West Yellowstone

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Cheap flight deals from St. Louis to West Yellowstone

Round-trip from	$485 (United Airlines)
One-way from	$119 (Delta)

From Lambert-St Louis to West Yellowstone

Search Deals

One-way flight from Lambert-St Louis to West Yellowstone

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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 July 16, 2025.

Tue 7/295:00 amSTL - WYS

2 stops9h 20mUnited Airlines

Sat 8/22:02 pmWYS - STL

1 stop5h 43mUnited Airlines

Deal found 7/14

$488

Tue 7/297:45 amSTL - WYS

1 stop8h 01mDelta

Sat 8/23:25 pmWYS - STL

1 stop5h 46mDelta

Deal found 7/14

$561

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 July 16, 2025.

Tue 9/25:15 amSTL - WYS

1 stop5h 19mUnited Airlines

Sat 9/610:15 amWYS - STL

1 stop9h 31mUnited Airlines

Deal found 7/16

$485

Tue 7/297:45 amSTL - WYS

1 stop8h 01mDelta

Sat 8/23:25 pmWYS - STL

1 stop5h 46mDelta

Deal found 7/14

$561

Last-minute flights from St. Louis to West Yellowstone
Discover last-minute flight deals from St. Louis to West Yellowstone. Data last updated July 16, 2025 and is based on user searches.

Tue 7/295:00 amSTL - WYS

2 stops9h 20mUnited Airlines

Sat 8/22:02 pmWYS - STL

1 stop5h 43mUnited Airlines

Deal found 7/14

$488

Tue 7/297:45 amSTL - WYS

1 stop8h 01mDelta

Sat 8/23:25 pmWYS - STL

1 stop5h 46mDelta

Deal found 7/14

$561

One-way flights from St. Louis to West Yellowstone
Search for one-way flight options from St. Louis to West Yellowstone. Find affordable one-way fares based on user searches. Data last updated July 16, 2025.

Wed 8/137:35 amSTL - WYS

1 stop8h 15mDelta

Deal found 7/14

$119

Wed 8/135:41 pmSTL - WYS

3 stops44h 39mUnited Airlines

Deal found 7/14

$426

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

Tue 9/2

5:15 am-9:34 am

1 stop5h 19m

West Yellowstone

Sat 9/6

10:15 am-8:46 pm

1 stop9h 31m

$485

St. LouisWest Yellowstone

STL - WYS

STLWYS

Lambert-St Louis

Tue 7/29

7:45 am-2:46 pm

1 stop8h 01m

West Yellowstone

Sat 8/2

3:25 pm-10:11 pm

1 stop5h 46m

$561

St. LouisWest Yellowstone

STL - WYS

STLWYS

Lambert-St Louis

Wed 8/13

7:35 am-2:50 pm

1 stop8h 15m

$119

St. LouisWest Yellowstone

STL - WYS

STLWYS

Lambert-St Louis

Wed 8/13

5:41 pm-1:20 pm

3 stops44h 39m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/14

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.

Reviews of airlines servicing West Yellowstone

See what other customers who have flown with Delta and United Airlines from St. Louis to West Yellowstone have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,957 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,957 reviews

Delta

8.0

Very good

7,957 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,863 reviews

Delta

8.0

Very good

7,957 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from St. Louis to West Yellowstone round-trip?
United Airlines, at $485, was found to be the cheapest airline from St. Louis to West Yellowstone. An alternate airline flying to your destination would be Delta.
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 airline flying from St. Louis to West Yellowstone

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$440	Average$725	FlexibilityNo cancel fee	On-time69%

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$119+ Cheap flights from St. Louis to West Yellowstone (STL - WYS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to West Yellowstone with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to West Yellowstone

Round-trip from

One-way 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 July 16, 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 July 16, 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.

Reviews of airlines servicing West Yellowstone

See what other customers who have flown with Delta and United Airlines from St. Louis to West Yellowstone have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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 are the cheapest airlines flying 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 West Yellowstone?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to West Yellowstone

See prices for flight routes from nearby airports that may be better suited for you.

Top airline 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 July 16, 2025.