There are
2,612 mi
from Pasadena, CA to Rockville, MD
That's the driving distance. It would take 1 day 22 hours to go from Pasadena, California to Rockville, Maryland.
The flight distance (direct flight from Pasadena, CA to Rockville, MD) is 2,279.32 mi.
2,612 mi = 4,203.23 kms