There are
2,759 mi
from Gaithersburg, MD to Lompoc, CA
That's the driving distance. It would take 2 days 1 hour to go from Gaithersburg, Maryland to Lompoc, California.
The flight distance (direct flight from Gaithersburg, MD to Lompoc, CA) is 2,387.85 mi.
2,759 mi = 4,440.64 kms