There are
977 mi
from Rancho Cucamonga, CA to Westminster, CO
That's the driving distance. It would take 17 hours 2 mins to go from Rancho Cucamonga, California to Westminster, Colorado.
The flight distance (direct flight from Rancho Cucamonga, CA to Westminster, CO) is 797.10 mi.
977 mi = 1,572.76 kms