There are
2,610 mi
from Gaithersburg, MD to La Mirada, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to La Mirada, California.
The flight distance (direct flight from Gaithersburg, MD to La Mirada, CA) is 2,275.01 mi.
2,610 mi = 4,200.07 kms