There are
2,529 mi
from Gaithersburg, MD to Rancho Mirage, CA
That's the driving distance. It would take 1 day 21 hours to go from Gaithersburg, Maryland to Rancho Mirage, California.
The flight distance (direct flight from Gaithersburg, MD to Rancho Mirage, CA) is 2,193.91 mi.
2,529 mi = 4,069.55 kms