There are
2,626 mi
from Mission Viejo, CA to Gaithersburg, MD
That's the driving distance. It would take 1 day 23 hours to go from Mission Viejo, California to Gaithersburg, Maryland.
The flight distance (direct flight from Mission Viejo, CA to Gaithersburg, MD) is 2,264.82 mi.
2,626 mi = 3.22 kms