There are
2,744 mi
from Gaithersburg, MD to Santa Maria, CA
That's the driving distance. It would take 2 days 1 hour to go from Gaithersburg, Maryland to Santa Maria, California.
The flight distance (direct flight from Gaithersburg, MD to Santa Maria, CA) is 2,379.17 mi.
2,744 mi = 4,415.56 kms