There are
1,506 mi
from Kennewick, WA to Amarillo, TX
That's the driving distance. It would take 1 day 2 hours to go from Kennewick, Washington to Amarillo, Texas.
The flight distance (direct flight from Kennewick, WA to Amarillo, TX) is 1,177.74 mi.
1,506 mi = 2,422.89 kms