There are
2,579 mi
from Rockville, MD to Yucaipa, CA
That's the driving distance. It would take 1 day 22 hours to go from Rockville, Maryland to Yucaipa, California.
The flight distance (direct flight from Rockville, MD to Yucaipa, CA) is 2,223.16 mi.
2,579 mi = 4,150.20 kms