Miles between Longmont, CO and Great Falls, MT

There are
747 mi
from Longmont, CO to Great Falls, MT

That's the driving distance. It would take 12 hours 51 mins to go from Longmont, Colorado to Great Falls, Montana.

The flight distance (direct flight from Longmont, CO to Great Falls, MT) is 592.98 mi.

747 mi = 1,202.35 kms