Miles between Amarillo, TX and Longmont, CO

There are
448 mi
from Amarillo, TX to Longmont, CO

That's the driving distance. It would take 8 hours 24 mins to go from Amarillo, Texas to Longmont, Colorado.

The flight distance (direct flight from Amarillo, TX to Longmont, CO) is 385.57 mi.

448 mi = 720.87 kms