There are
2,017 mi
from Kennewick, WA to Herrin, IL
That's the driving distance. It would take 1 day 10 hours to go from Kennewick, Washington to Herrin, Illinois.
The flight distance (direct flight from Kennewick, WA to Herrin, IL) is 1,639.35 mi.
2,017 mi = 3,246.14 kms