There are
2,600 mi
from Gaithersburg, MD to Temecula, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Temecula, California.
The flight distance (direct flight from Gaithersburg, MD to Temecula, CA) is 2,239.49 mi.
2,600 mi = 4,184.44 kms