There are
2,770 mi
from Redding, CA to Gaithersburg, MD
That's the driving distance. It would take 2 days to go from Redding, California to Gaithersburg, Maryland.
The flight distance (direct flight from Redding, CA to Gaithersburg, MD) is 2,372.10 mi.
2,770 mi = 3.22 kms