There are
2,054 mi
from Rockville, MD to Clearfield, UT
That's the driving distance. It would take 1 day 12 hours to go from Rockville, Maryland to Clearfield, Utah.
The flight distance (direct flight from Rockville, MD to Clearfield, UT) is 1,836.16 mi.
2,054 mi = 3,305.57 kms