$245 Cheap Flights from Casper (CPR) to Rock Springs (RKS)

View $245 flight on Sat, Sep 27, 2025Opens in a new window

Popular airlines from Casper, WY (CPR-Natrona County Intl.) to Rock Springs, WY (RKS-Sweetwater County)

Cheap Flights from Casper to Rock Springs (CPR-RKS)

Prices were available within the past 7 days and start at $245 for one-way flights and $478 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Sep 1 - Sun, Sep 21
CPR
Casper
RKS
Rock Springs
$478 Roundtrip, found 5 days ago
$478
Roundtrip
found 5 days ago
Select United flight, departing Mon, Sep 1 from Casper to Rock Springs, returning Sun, Sep 21, priced at $478 found 5 days ago
United
Mon, Aug 25 - Thu, Sep 11
CPR
Casper
RKS
Rock Springs
$483 Roundtrip, found 5 days ago
$483
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 25 from Casper to Rock Springs, returning Thu, Sep 11, priced at $483 found 5 days ago
United
Mon, Aug 25 - Sun, Aug 31
CPR
Casper
RKS
Rock Springs
$488 Roundtrip, found 5 days ago
$488
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 25 from Casper to Rock Springs, returning Sun, Aug 31, priced at $488 found 5 days ago
United
Sun, Aug 24 - Wed, Sep 3
CPR
Casper
RKS
Rock Springs
$493 Roundtrip, found 5 days ago
$493
Roundtrip
found 5 days ago
Select United flight, departing Sun, Aug 24 from Casper to Rock Springs, returning Wed, Sep 3, priced at $493 found 5 days ago
United
Wed, Sep 17 - Sun, Oct 5
CPR
Casper
RKS
Rock Springs
$508 Roundtrip, found 5 days ago
$508
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 17 from Casper to Rock Springs, returning Sun, Oct 5, priced at $508 found 5 days ago
United
Mon, Sep 29 - Wed, Oct 15
CPR
Casper
RKS
Rock Springs
$518 Roundtrip, found 5 days ago
$518
Roundtrip
found 5 days ago
Select United flight, departing Mon, Sep 29 from Casper to Rock Springs, returning Wed, Oct 15, priced at $518 found 5 days ago
United
Sun, Sep 7 - Sun, Sep 21
CPR
Casper
RKS
Rock Springs
$523 Roundtrip, found 5 days ago
$523
Roundtrip
found 5 days ago
Select United flight, departing Sun, Sep 7 from Casper to Rock Springs, returning Sun, Sep 21, priced at $523 found 5 days ago
United
Sun, Aug 31 - Sat, Sep 6
CPR
Casper
RKS
Rock Springs
$528 Roundtrip, found 5 days ago
$528
Roundtrip
found 5 days ago
Select United flight, departing Sun, Aug 31 from Casper to Rock Springs, returning Sat, Sep 6, priced at $528 found 5 days ago
United
Tue, Aug 19 - Wed, Sep 3
CPR
Casper
RKS
Rock Springs
$533 Roundtrip, found 5 days ago
$533
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 19 from Casper to Rock Springs, returning Wed, Sep 3, priced at $533 found 5 days ago
United
Tue, Aug 19 - Mon, Aug 25
CPR
Casper
RKS
Rock Springs
$538 Roundtrip, found 6 days ago
$538
Roundtrip
found 6 days ago
Select United flight, departing Tue, Aug 19 from Casper to Rock Springs, returning Mon, Aug 25, priced at $538 found 6 days 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 $483
RKS
Sweetwater County
CheapestClosest
Average driving time to city center14 min
Flights from $483
Flights from Casper (CPR) to Rock Springs (RKS)
Origin airport
Natrona County Intl.
Destination airport
Sweetwater County
Roundtrip price
$478
Distance
160 mi

Casper to Rock Springs Flights

The cheapest times to fly from Casper 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 Casper to Rock Springs are during the month of September. You can find some of the cheapest flights from Casper to Rock Springs with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Casper 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 Casper 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 Casper to Rock Springs in 2025. You can also book with separate airlines for your outbound and return journeys, from $245 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 Casper 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 Casper 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.

 

Frequently asked questions

How much does a flight from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS) cost?
Lock in a cheap one-way flight from $245 or cheap return flight from $478 from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS)?
The cheapest month to fly from CPR to RKS is September, when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS)?
To find the cheapest airline flying from CPR to RKS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS)?
There aren't any daily nonstop flights available from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS). But you can opt for 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 CPR to RKS?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS)?
Choose a flight from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS) last-minute?
Holding off until right before your break to book a flight from CPR to RKS generally means paying more. While you might find some last-minute discounts, they aren't always guaranteed. Be flexible with your travel plans for a better chance of scoring a bargain.
Is it cheaper to book a CPR to RKS flight and hotel package?
Compared with arranging flights and hotels separately, booking a CPR to RKS flight and hotel package with Expedia could lead to significant savings. Better yet, managing everything in one place will take the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Natrona County Intl. Airport (CPR) to Sweetwater County Airport (RKS)?
If you booked your CPR to RKS flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

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*Available to One Key members.