There are
1,870 mi
from Elgin, IL to Kennewick, WA
That's the driving distance. It would take 1 day 8 hours to go from Elgin, Illinois to Kennewick, Washington.
The flight distance (direct flight from Elgin, IL to Kennewick, WA) is 1,547.10 mi.
1,870 mi = 1.61 kms