Miles between Allen, TX and Decatur, AL

There are
633 mi
from Allen, TX to Decatur, AL

That's the driving distance. It would take 11 hours 37 mins to go from Allen, Texas to Decatur, Alabama.

The flight distance (direct flight from Allen, TX to Decatur, AL) is 565.22 mi.

633 mi = 1,018.89 kms