Miles between Boulder, CO and St Louis, MO

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

That's the driving distance. It would take 15 hours 21 mins to go from Boulder, Colorado to St Louis, Missouri.

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

869 mi = 1,398.15 kms