Miles between Longmont, CO and Ballwin, MO

There are
862 mi
from Longmont, CO to Ballwin, MO

That's the driving distance. It would take 15 hours 11 mins to go from Longmont, Colorado to Ballwin, Missouri.

The flight distance (direct flight from Longmont, CO to Ballwin, MO) is 784 mi.

862 mi = 1,386.59 kms