There are
1,656 mi
from Amarillo, TX to Milwaukie, OR
That's the driving distance. It would take 1 day 5 hours to go from Amarillo, Texas to Milwaukie, Oregon.
The flight distance (direct flight from Amarillo, TX to Milwaukie, OR) is 1,297.86 mi.
1,656 mi = 1.61 kms