There are
1,827 mi
from St Louis, MO to La Palma, CA
That's the driving distance. It would take 1 day 7 hours to go from St Louis, Missouri to La Palma, California.
The flight distance (direct flight from St Louis, MO to La Palma, CA) is 1,580.24 mi.
1,827 mi = 2,940.92 kms