There are
2,619 mi
from Rockville, MD to Irvine, CA
That's the driving distance. It would take 1 day 22 hours to go from Rockville, Maryland to Irvine, California.
The flight distance (direct flight from Rockville, MD to Irvine, CA) is 2,272.11 mi.
2,619 mi = 4,215.54 kms