There are
1,848 mi
from Kennewick, WA to Troy, MO
That's the driving distance. It would take 1 day 7 hours to go from Kennewick, Washington to Troy, Missouri.
The flight distance (direct flight from Kennewick, WA to Troy, MO) is 1,507.29 mi.
1,848 mi = 2,973.84 kms