There are
2,793 mi
from Rockville, MD to Rohnert Park, CA
That's the driving distance. It would take 2 days 1 hour to go from Rockville, Maryland to Rohnert Park, California.
The flight distance (direct flight from Rockville, MD to Rohnert Park, CA) is 2,429.95 mi.
2,793 mi = 4,495.35 kms