There are
2,060 mi
from Chatham, IL to Lompoc, CA
That's the driving distance. It would take 1 day 12 hours to go from Chatham, Illinois to Lompoc, California.
The flight distance (direct flight from Chatham, IL to Lompoc, CA) is 1,720 mi.
2,060 mi = 3,315.55 kms