There are
1,951 mi
from Mt Prospect, IL to Yakima, WA
That's the driving distance. It would take 1 day 9 hours to go from Mt Prospect, Illinois to Yakima, Washington.
The flight distance (direct flight from Mt Prospect, IL to Yakima, WA) is 1,627.65 mi.
1,951 mi = 3,140.31 kms