There are
1,884 mi
from Longmont, CO to Holyoke, MA
That's the driving distance. It would take 1 day 10 hours to go from Longmont, Colorado to Holyoke, Massachusetts.
The flight distance (direct flight from Longmont, CO to Holyoke, MA) is 1,684.82 mi.
1,884 mi = 1.61 kms