There are
2,028 mi
from St Louis, MO to Lathrop, CA
That's the driving distance. It would take 1 day 11 hours to go from St Louis, Missouri to Lathrop, California.
The flight distance (direct flight from St Louis, MO to Lathrop, CA) is 1,679.69 mi.
2,028 mi = 3.22 kms