Miles between Boise, ID and Great Falls, MT

There are
639 mi
from Boise, ID to Great Falls, MT

That's the driving distance. It would take 10 hours 15 mins to go from Boise, Idaho to Great Falls, Montana.

The flight distance (direct flight from Boise, ID to Great Falls, MT) is 359.23 mi.

639 mi = 1,028.83 kms