There are
883 mi
from San Bernardino, CA to Rexburg, ID
That's the driving distance. It would take 15 hours 5 mins to go from San Bernardino, California to Rexburg, Idaho.
The flight distance (direct flight from San Bernardino, CA to Rexburg, ID) is 733.05 mi.
883 mi = 1,420.42 kms