There are
2,598 mi
from Gaithersburg, MD to Perris, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Perris, California.
The flight distance (direct flight from Gaithersburg, MD to Perris, CA) is 2,236.51 mi.
2,598 mi = 4,181.50 kms