$587+ Cheap flights from Illinois to West Yellowstone (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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WYS
Jan 2 — Jan 91
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Illinois to West Yellowstone with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to West Yellowstone
Best flights from Illinois to West YellowstoneDiscover carefully curated flight deals from Illinois to West Yellowstone that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 3, 2025.
Discover carefully curated flight deals from Illinois to West Yellowstone that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 3, 2025.
This United Airlines deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:45 pmORD - WYS
1 stop16h 35mUnited Airlines
Mon 6/82:02 pmWYS - ORD
1 stop18h 41mUnited Airlines
Deal found 12/1![United Airlines logo]()
$587
Find flight deals from Illinois to West Yellowstone
Keep the following information in mind while searching for Illinois to West Yellowstone flight deals. Data was last updated December 3, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $587 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to West Yellowstone that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
Use the filters below to find and compare flights from Illinois to West Yellowstone that are best for you.
Fly from
Illinois
Fly to
West Yellowstone
Route
Depart
Return
Price
ChicagoWest Yellowstone
ORD - WYS
ORDWYS
Chicago O'Hare Intl
Mon 6/1
9:45 pm-1:20 pm
1 stop16h 35m
West Yellowstone
Mon 6/8
2:02 pm-9:43 am
1 stop18h 41m
$587
Best time to book a flight from Illinois to West Yellowstone
Have a flexible travel schedule? Discover the best time to fly to West Yellowstone from Illinois 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 Illinois to West Yellowstone
What is the cheapest month to book a flight from Illinois to West Yellowstone?
Currently, October is the cheapest month in which you can book a flight from Illinois to West Yellowstone (average of $190). Flying from Illinois to West Yellowstone in March is currently the most expensive (average of $289). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Related info for your journey
Find useful and relevant information for your journey from Illinois to West Yellowstone. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near West Yellowstone?
Book flights to West Yellowstone if you plan to visit one of these locationsIsland Park
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Illinois to West Yellowstone
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Illinois to West Yellowstone
Discover the top airline that operate flights from Illinois to West Yellowstone. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$410 | Average$710 | FlexibilityNo cancel fee | On-time69% |