There are
2,582 mi
from Rockville, MD to Calexico, CA
That's the driving distance. It would take 1 day 21 hours to go from Rockville, Maryland to Calexico, California.
The flight distance (direct flight from Rockville, MD to Calexico, CA) is 2,175.12 mi.
2,582 mi = 4,154.51 kms