Miles between Longmont, CO and Markham, IL

There are
998 mi
from Longmont, CO to Markham, IL

That's the driving distance. It would take 17 hours 46 mins to go from Longmont, Colorado to Markham, Illinois.

The flight distance (direct flight from Longmont, CO to Markham, IL) is 913.10 mi.

998 mi = 1,606.17 kms