Miles between Naperville, IL and Longmont, CO

There are
973 mi
from Naperville, IL to Longmont, CO

That's the driving distance. It would take 17 hours 18 mins to go from Naperville, Illinois to Longmont, Colorado.

The flight distance (direct flight from Naperville, IL to Longmont, CO) is 889.99 mi.

973 mi = 1,565.92 kms