There are
187 mi
from Rancho Cucamonga, CA to Lompoc, CA
That's the driving distance. It would take 3 hours 43 mins to go from Rancho Cucamonga, California to Lompoc, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Lompoc, CA) is 167.47 mi.
187 mi = 300.54 kms