Williston Basin International Airport (IATA: XWA, ICAO: KXWA, FAA LID: XWA) is an airport serving Williston, a city in the U.S. state of North Dakota. It is located 9 nautical miles (17km) northwest of the city.

Williston Basin Airport has two runways and a 110,000-square-foot (10,000 m2) terminal building. It was built to replace Sloulin Field International Airport, which previously served Williston and had experienced difficulty dealing with the increase in air traffic to Williston amid the North Dakota oil boom. The airport opened to the public on October 10, 2019.