Miles between St Louis, MO and Boulder, CO

There are
869 mi
from St Louis, MO to Boulder, CO

That's the driving distance. It would take 15 hours 23 mins to go from St Louis, Missouri to Boulder, Colorado.

The flight distance (direct flight from St Louis, MO to Boulder, CO) is 810.29 mi.

869 mi = 1,398.47 kms