There are
1,630 mi
from Rockville, MD to Lubbock, TX
That's the driving distance. It would take 1 day 5 hours to go from Rockville, Maryland to Lubbock, Texas.
The flight distance (direct flight from Rockville, MD to Lubbock, TX) is 1,421.65 mi.
1,630 mi = 2,623.72 kms