There are
1,907 mi
from Kennewick, WA to Cahokia, IL
That's the driving distance. It would take 1 day 8 hours to go from Kennewick, Washington to Cahokia, Illinois.
The flight distance (direct flight from Kennewick, WA to Cahokia, IL) is 1,558.21 mi.
1,907 mi = 3,068.25 kms