There are
2,018 mi
from Kennewick, WA to Marshall, TX
That's the driving distance. It would take 1 day 11 hours to go from Kennewick, Washington to Marshall, Texas.
The flight distance (direct flight from Kennewick, WA to Marshall, TX) is 1,614.12 mi.
2,018 mi = 3,247.50 kms