There are
1,722 mi
from Longmont, CO to Hanahan, SC
That's the driving distance. It would take 1 day 7 hours to go from Longmont, Colorado to Hanahan, South Carolina.
The flight distance (direct flight from Longmont, CO to Hanahan, SC) is 1,473.78 mi.
1,722 mi = 1.61 kms