There are
1,380 mi
from Rockville, MD to Ardmore, OK
That's the driving distance. It would take 1 day 1 hour to go from Rockville, Maryland to Ardmore, Oklahoma.
The flight distance (direct flight from Rockville, MD to Ardmore, OK) is 1,156.41 mi.
1,380 mi = 2,220.78 kms