There are
2,619 mi
from Rockville, MD to Tustin, CA
That's the driving distance. It would take 1 day 22 hours to go from Rockville, Maryland to Tustin, California.
The flight distance (direct flight from Rockville, MD to Tustin, CA) is 2,272.22 mi.
2,619 mi = 4,214.07 kms