There are
2,580 mi
from Rockville, MD to San Jacinto, CA
That's the driving distance. It would take 1 day 22 hours to go from Rockville, Maryland to San Jacinto, California.
The flight distance (direct flight from Rockville, MD to San Jacinto, CA) is 2,224.84 mi.
2,580 mi = 4,152.81 kms