Miles between Longmont, CO and St Louis, MO

There are
877 mi
from Longmont, CO to St Louis, MO

That's the driving distance. It would take 15 hours 26 mins to go from Longmont, Colorado to St Louis, Missouri.

The flight distance (direct flight from Longmont, CO to St Louis, MO) is 801.81 mi.

877 mi = 1,410.70 kms