$265 Cheap Flights from Chicago (ORD) to Rock Springs (RKS)

View $265 flight on Sat, Nov 22, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Rock Springs, WY (RKS-Sweetwater County)

Cheap Flights from Chicago to Rock Springs (ORD-RKS)

Prices were available within the past 7 days and start at $265 for one-way flights and $291 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Oct 31 - Fri, Nov 7
ORD
Chicago
RKS
Rock Springs
$291 Roundtrip, found 2 days ago
$291
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 31 from Chicago to Rock Springs, returning Fri, Nov 7, priced at $291 found 2 days ago
United
Thu, Nov 20 - Mon, Dec 8
ORD
Chicago
RKS
Rock Springs
$328 Roundtrip, found 10 hours ago
$328
Roundtrip
found 10 hours ago
Select United flight, departing Thu, Nov 20 from Chicago to Rock Springs, returning Mon, Dec 8, priced at $328 found 10 hours ago
United
Fri, Oct 31 - Fri, Nov 7
ORD
Chicago
RKS
Rock Springs
$341 Roundtrip, found 2 days ago
$341
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 31 from Chicago to Rock Springs, returning Fri, Nov 7, priced at $341 found 2 days ago
United
Sat, Nov 1 - Tue, Nov 18
ORD
Chicago
RKS
Rock Springs
$343 Roundtrip, found 1 day ago
$343
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from Chicago to Rock Springs, returning Tue, Nov 18, priced at $343 found 1 day ago
United
Fri, Oct 31 - Tue, Nov 4
ORD
Chicago
RKS
Rock Springs
$358 Roundtrip, found 2 days ago
$358
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 31 from Chicago to Rock Springs, returning Tue, Nov 4, priced at $358 found 2 days ago
United
Sat, Nov 22 - Mon, Dec 8
ORD
Chicago
RKS
Rock Springs
$369 Roundtrip, found 10 hours ago
$369
Roundtrip
found 10 hours ago
Select United flight, departing Sat, Nov 22 from Chicago to Rock Springs, returning Mon, Dec 8, priced at $369 found 10 hours ago
United
Fri, Oct 31 - Fri, Nov 7
ORD
Chicago
RKS
Rock Springs
$371 Roundtrip, found 2 days ago
$371
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 31 from Chicago to Rock Springs, returning Fri, Nov 7, priced at $371 found 2 days ago
United
Wed, Oct 29 - Sat, Nov 8
ORD
Chicago
RKS
Rock Springs
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 29 from Chicago to Rock Springs, returning Sat, Nov 8, priced at $383 found 2 days ago
United
Tue, Jun 9 - Sat, Jun 13
ORD
Chicago
RKS
Rock Springs
$389 Roundtrip, found 11 hours ago
$389
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Jun 9 from Chicago to Rock Springs, returning Sat, Jun 13, priced at $389 found 11 hours ago
United
Mon, Nov 24 - Mon, Dec 8
ORD
Chicago
RKS
Rock Springs
$393 Roundtrip, found 1 day ago
$393
Roundtrip
found 1 day ago
Select United flight, departing Mon, Nov 24 from Chicago to Rock Springs, returning Mon, Dec 8, priced at $393 found 1 day ago

Alternative airports near Rock Springs

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sweetwater County RKS. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $343
RKS
Sweetwater County
CheapestClosest
Average driving time to city center14 min
Flights from $343

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS) cost?
Get a cheap one-way flight from $265 or cheap return flight from $291 from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS)?
Planning your getaway for October can help you save, as it's the cheapest month for flights between ORD and RKS. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest ORD to RKS flight.
How many flights per day from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS)?
Nonstop flights from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ORD to RKS?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can change depending on the airline, season 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 O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS)?
To avoid possible delays on the O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS) route, travel before 3 PM. Departures after this hour 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 O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS) last-minute?
Last-minute bookings from ORD to RKS are generally more expensive. To secure the cheapest rates, start looking for flights as early as possible. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before you leave.
Is it cheaper to book an ORD to RKS flight and hotel package?
Booking an ORD to RKS flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our wide range of accommodations and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Sweetwater County Airport (RKS)?
In most instances, you can cancel or modify your ORD to RKS flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you want further details, go to our Customer Service portal.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Sweetwater County
Airlines serving
United
Roundtrip price
$291
Distance
1087 mi

Book with confidence

Chicago to Rock Springs Flights

The cheapest times to fly from Chicago to Rock Springs

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 Chicago to Rock Springs are during the month of October. You can find some of the cheapest flights from Chicago to Rock Springs with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Rock Springs

Sunday is one of the best days to book for cheap flights from Chicago to Rock Springs: 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 Chicago to Rock Springs

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 Chicago to Rock Springs in 2025. You can also book with separate airlines for your outbound and return journeys, from $265 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 Chicago to Rock Springs 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 Chicago to Rock Springs 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.

 

Chicago to Rock Springs Flights

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*Available to One Key members.