There are
2,594 mi
from Redlands, CA to Gaithersburg, MD
That's the driving distance. It would take 1 day 22 hours to go from Redlands, California to Gaithersburg, Maryland.
The flight distance (direct flight from Redlands, CA to Gaithersburg, MD) is 2,227.25 mi.
2,594 mi = 3.22 kms