There are
1,777 mi
from Fontana, CA to Maryland Heights, MO
That's the driving distance. It would take 1 day 6 hours to go from Fontana, California to Maryland Heights, Missouri.
The flight distance (direct flight from Fontana, CA to Maryland Heights, MO) is 1,529.44 mi.
1,777 mi = 2,860.25 kms