There are
2,583 mi
from Gaithersburg, MD to Upland, CA
That's the driving distance. It would take 1 day 22 hours to go from Gaithersburg, Maryland to Upland, California.
The flight distance (direct flight from Gaithersburg, MD to Upland, CA) is 2,251.09 mi.
2,583 mi = 4,156.20 kms