There are
1,873 mi
from Kennewick, WA to Allen, TX
That's the driving distance. It would take 1 day 8 hours to go from Kennewick, Washington to Allen, Texas.
The flight distance (direct flight from Kennewick, WA to Allen, TX) is 1,490.57 mi.
1,873 mi = 3,014.87 kms