There are
861 mi
from San Leandro, CA to Rexburg, ID
That's the driving distance. It would take 15 hours 16 mins to go from San Leandro, California to Rexburg, Idaho.
The flight distance (direct flight from San Leandro, CA to Rexburg, ID) is 686.12 mi.
861 mi = 1,385.26 kms