There are
979 mi
from Rialto, CA to Broomfield, CO
That's the driving distance. It would take 17 hours 8 mins to go from Rialto, California to Broomfield, Colorado.
The flight distance (direct flight from Rialto, CA to Broomfield, CO) is 786.70 mi.
979 mi = 1,575.91 kms