There are
1,473 mi
from St Charles, MO to Butte, MT
That's the driving distance. It would take 1 day 1 hour to go from St Charles, Missouri to Butte, Montana.
The flight distance (direct flight from St Charles, MO to Butte, MT) is 1,224.07 mi.
1,473 mi = 2,371.31 kms