There are
1,814 mi
from Kennewick, WA to Gainesville, TX
That's the driving distance. It would take 1 day 7 hours to go from Kennewick, Washington to Gainesville, Texas.
The flight distance (direct flight from Kennewick, WA to Gainesville, TX) is 1,446.30 mi.
1,814 mi = 2,920.08 kms