Miles between Ontario, CA and Rockville, MD

There are
2,585 mi
from Ontario, CA to Rockville, MD

That's the driving distance. It would take 1 day 22 hours to go from Ontario, California to Rockville, Maryland.

The flight distance (direct flight from Ontario, CA to Rockville, MD) is 2,254.97 mi.

2,585 mi = 4,160.53 kms