There are
1,055 mi
from Sioux City, IA to Rexburg, ID
That's the driving distance. It would take 18 hours 32 mins to go from Sioux City, Iowa to Rexburg, Idaho.
The flight distance (direct flight from Sioux City, IA to Rexburg, ID) is 779.59 mi.
1,055 mi = 1.61 kms