There are
1,445 mi
from Elgin, IL to Rexburg, ID
That's the driving distance. It would take 1 day 1 hour to go from Elgin, Illinois to Rexburg, Idaho.
The flight distance (direct flight from Elgin, IL to Rexburg, ID) is 1,191.37 mi.
1,445 mi = 1.61 kms