Miles between Billings, MT and Longmont, CO

There are
529 mi
from Billings, MT to Longmont, CO

That's the driving distance. It would take 8 hours 41 mins to go from Billings, Montana to Longmont, Colorado.

The flight distance (direct flight from Billings, MT to Longmont, CO) is 424.27 mi.

529 mi = 850.68 kms