Miles between Great Falls, MT and Duarte, CA

There are
1,239 mi
from Great Falls, MT to Duarte, CA

That's the driving distance. It would take 20 hours 47 mins to go from Great Falls, Montana to Duarte, California.

The flight distance (direct flight from Great Falls, MT to Duarte, CA) is 985.99 mi.

1,239 mi = 1,993.18 kms