Miles between Casper, WY and Longmont, CO

There are
254 mi
from Casper, WY to Longmont, CO

That's the driving distance. It would take 4 hours 19 mins to go from Casper, Wyoming to Longmont, Colorado.

The flight distance (direct flight from Casper, WY to Longmont, CO) is 196.75 mi.

254 mi = 409.19 kms