There are
1,852 mi
from Costa Mesa, CA to Shiloh, IL
That's the driving distance. It would take 1 day 8 hours to go from Costa Mesa, California to Shiloh, Illinois.
The flight distance (direct flight from Costa Mesa, CA to Shiloh, IL) is 1,594.25 mi.
1,852 mi = 2,980.50 kms