There are
2,645 mi
from Gaithersburg, MD to Santa Paula, CA
That's the driving distance. It would take 1 day 23 hours to go from Gaithersburg, Maryland to Santa Paula, California.
The flight distance (direct flight from Gaithersburg, MD to Santa Paula, CA) is 2,320.17 mi.
2,645 mi = 4,256.50 kms