Miles between Boulder, CO and St Charles, MO

There are
847 mi
from Boulder, CO to St Charles, MO

That's the driving distance. It would take 14 hours 56 mins to go from Boulder, Colorado to St Charles, Missouri.

The flight distance (direct flight from Boulder, CO to St Charles, MO) is 791.60 mi.

847 mi = 1,363.61 kms