There are
1,716 mi
from Amarillo, TX to Tukwila, WA
That's the driving distance. It would take 1 day 6 hours to go from Amarillo, Texas to Tukwila, Washington.
The flight distance (direct flight from Amarillo, TX to Tukwila, WA) is 1,349.10 mi.
1,716 mi = 1.61 kms