There are
2,615 mi
from Gaithersburg, MD to Irvine, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Irvine, California.
The flight distance (direct flight from Gaithersburg, MD to Irvine, CA) is 2,269.27 mi.
2,615 mi = 4,207.67 kms