There are
2,608 mi
from Rockville, MD to La Puente, CA
That's the driving distance. It would take 1 day 22 hours to go from Rockville, Maryland to La Puente, California.
The flight distance (direct flight from Rockville, MD to La Puente, CA) is 2,272.03 mi.
2,608 mi = 4,196.47 kms