There are
1,479 mi
from Mt Prospect, IL to Rexburg, ID
That's the driving distance. It would take 1 day 2 hours to go from Mt Prospect, Illinois to Rexburg, Idaho.
The flight distance (direct flight from Mt Prospect, IL to Rexburg, ID) is 1,208.01 mi.
1,479 mi = 2,380.63 kms