There are
2,768 mi
from Gaithersburg, MD to Redding, CA
That's the driving distance. It would take 2 days to go from Gaithersburg, Maryland to Redding, California.
The flight distance (direct flight from Gaithersburg, MD to Redding, CA) is 2,372.10 mi.
2,768 mi = 4,454.40 kms