There are
2,819 mi
from Ukiah, CA to Rockville, MD
That's the driving distance. It would take 2 days 2 hours to go from Ukiah, California to Rockville, Maryland.
The flight distance (direct flight from Ukiah, CA to Rockville, MD) is 2,441.44 mi.
2,819 mi = 4,536.67 kms