Title: Cheap flights from Williston to Casper from $457 (XWA to CPR) - Expedia.com ![Casper featuring landscape views and golf](https://images.trvl-media.com/place/6055899/008589a9-fc96-46ff-8eb9-c572559321cd.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Casper Area Convention and Visitors Bureau ![](https://images.trvl-media.com/place/6055899/008589a9-fc96-46ff-8eb9-c572559321cd.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $457 Cheap Flights from Williston (XWA) to Casper (CPR) [View $457 flight on Mon, Apr 6, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:XWA,to:CPR,departure:4/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:456.97&airProductToken=AQpnCjEI1YIBEgQ1MzY3GNcFIINpKJ_PiQMwo9CJAzhIQABYAWoFMl9lY29yCEhBQTdPREVOCjII1YIBEgQ0Njg3GINpIOKLASja0YkDMKbSiQM4SEAAWAFqBTJfZWNvcghIQUE3T0RFThIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAs) ## Popular airlines from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.com/Flights-Search?leg1=from:XWA,to:CPR,departure:4/5/2026TANYT&leg2=from:CPR,to:XWA,departure:4/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Williston to Casper (XWA-CPR) Prices were available within the past 7 days and start at $457 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ## Frequently asked questions ### How much does a flight from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.) cost? ### What is the cheapest month to fly from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### Which airlines fly direct from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### What is the cheapest airline that flies from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### How do I find cheap flights from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### What is the best time to fly from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### What is the earliest flight from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### What are the most popular departure times for flights from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### How long does it take to fly from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### Can you fly business or first class from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ### How do I earn miles on a Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.) flight with Expedia? ### What airports do you fly into for Casper from Basin Intl. (XWA)? ### Is it cheaper to buy a plane ticket from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.) at the last minute? ### Is it cheaper to book a Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package? ### Can I cancel or change the date of my flight from Williston, ND (XWA-Basin Intl.) to Casper, WY (CPR-Natrona County Intl.)? ## Travel information | Origin airport | Basin Intl. | | ------------------- | -------------------- | | Destination airport | Natrona County Intl. | | Distance | 392 mi | ## Book with confidence # 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 . 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 2026\. You can also book with separate airlines for your outbound and return journeys, from $457 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](https://www.expedia.com/package-deals). 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\. 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