$217 Cheap Flights from Williston (XWA) to Casper (CPR)

View $217 flight on Sun, Oct 19, 2025Opens in a new window

Popular airlines from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)

Cheap Flights from Williston to Casper (XWA-CPR)

Prices were available within the past 7 days and start at $217 for one-way flights and $439 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$439 Roundtrip, found 16 hours ago
$439
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $439 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$500 Roundtrip, found 16 hours ago
$500
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $500 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$509 Roundtrip, found 16 hours ago
$509
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $509 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$524 Roundtrip, found 16 hours ago
$524
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $524 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$529 Roundtrip, found 16 hours ago
$529
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $529 found 16 hours ago
United
Sat, Sep 20 - Mon, Sep 22
XWA
Williston
CPR
Casper
$533 Roundtrip, found 5 days ago
$533
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 20 from Williston to Casper, returning Mon, Sep 22, priced at $533 found 5 days ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$549 Roundtrip, found 16 hours ago
$549
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $549 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$554 Roundtrip, found 16 hours ago
$554
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $554 found 16 hours ago
United
Sat, Sep 6 - Sun, Sep 7
XWA
Williston
CPR
Casper
$568 Roundtrip, found 16 hours ago
$568
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Sep 6 from Williston to Casper, returning Sun, Sep 7, priced at $568 found 16 hours ago
United
Sat, Sep 20 - Mon, Sep 22
XWA
Williston
CPR
Casper
$575 Roundtrip, found 5 days ago
$575
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 20 from Williston to Casper, returning Mon, Sep 22, priced at $575 found 5 days ago
Flights from Williston (XWA) to Casper (CPR)
Origin airport
Basin Intl.
Destination airport
Natrona County Intl.
Roundtrip price
$438
Distance
392 mi

Williston to Casper Flights

The cheapest times to fly from Williston to Casper

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

 

The best time to book a flight from Williston to Casper

Sunday is one of the best days to book for cheap flights from Williston to Casper: 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 Williston to Casper

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 Williston to Casper in 2025. You can also book with separate airlines for your outbound and return journeys, from $217 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 Williston to Casper 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 Williston to Casper 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 Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR) cost?
Grab a cheap one-way flight from $217 or cheap return flight from $439 from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR) 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 Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR)?
Flying in September may help you find better deals, as it's the cheapest month for flights between XWA and CPR. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR)?
To find the cheapest airline that'll fly you from XWA to CPR, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR)?
Nonstop flights from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR) 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 XWA to CPR?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary 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 Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR)?
Opt for a flight from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 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 Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR) last-minute?
Last-minute bookings from XWA to CPR are usually more expensive. To lock in the lowest prices, start looking for flights well in advance. That being said, if your travel plans are flexible, it's possible to land a cheap fare just before your departure.
Is it cheaper to book a XWA to CPR flight and hotel package?
You'll generally save money by securing a XWA to CPR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your ideal flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Basin Intl. Airport (XWA) to Natrona County Intl. Airport (CPR)?
In most cases, you can cancel or modify your XWA to CPR flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.