There are
276 mi
from Rockville, MD to Peekskill, NY
That's the driving distance. It would take 5 hours 40 mins to go from Rockville, Maryland to Peekskill, New York.
The flight distance (direct flight from Rockville, MD to Peekskill, NY) is 228.76 mi.
276 mi = 443.73 kms