There are
1,867 mi
from Kennewick, WA to Elgin, IL
That's the driving distance. It would take 1 day 8 hours to go from Kennewick, Washington to Elgin, Illinois.
The flight distance (direct flight from Kennewick, WA to Elgin, IL) is 1,547.10 mi.
1,867 mi = 3,004.77 kms