There are
1,979 mi
from Fairfield, CA to Lake St Louis, MO
That's the driving distance. It would take 1 day 10 hours to go from Fairfield, California to Lake St Louis, Missouri.
The flight distance (direct flight from Fairfield, CA to Lake St Louis, MO) is 1,681.64 mi.
1,979 mi = 1.61 kms