There are
2,693 mi
from Rockville, MD to Coronado, CA
That's the driving distance. It would take 1 day 23 hours to go from Rockville, Maryland to Coronado, California.
The flight distance (direct flight from Rockville, MD to Coronado, CA) is 2,265.24 mi.
2,693 mi = 4,334.50 kms