There are
2,749 mi
from Santa Maria, CA to Gaithersburg, MD
That's the driving distance. It would take 2 days 1 hour to go from Santa Maria, California to Gaithersburg, Maryland.
The flight distance (direct flight from Santa Maria, CA to Gaithersburg, MD) is 2,379.17 mi.
2,749 mi = 3.22 kms