There are
2,492 mi
from Gaithersburg, MD to Twentynine Palms, CA
That's the driving distance. It would take 1 day 20 hours to go from Gaithersburg, Maryland to Twentynine Palms, California.
The flight distance (direct flight from Gaithersburg, MD to Twentynine Palms, CA) is 2,164.90 mi.
2,492 mi = 4,009.70 kms