Miles between Casper, WY and Williston, ND

There are
521 mi
from Casper, WY to Williston, ND

That's the driving distance. It would take 9 hours 13 mins to go from Casper, Wyoming to Williston, North Dakota.

The flight distance (direct flight from Casper, WY to Williston, ND) is 387.41 mi.

521 mi = 838.97 kms