There are
1,446 mi
from Rockville, MD to Rosenberg, TX
That's the driving distance. It would take 1 day 2 hours to go from Rockville, Maryland to Rosenberg, Texas.
The flight distance (direct flight from Rockville, MD to Rosenberg, TX) is 1,247.84 mi.
1,446 mi = 2,327.04 kms