Miles between Longmont, CO and Casper, WY

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

That's the driving distance. It would take 4 hours 18 mins to go from Longmont, Colorado to Casper, Wyoming.

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

254 mi = 409.14 kms