There are
2,121 mi
from St Charles, IL to Lompoc, CA
That's the driving distance. It would take 1 day 13 hours to go from St Charles, Illinois to Lompoc, California.
The flight distance (direct flight from St Charles, IL to Lompoc, CA) is 1,802.84 mi.
2,121 mi = 3,413.91 kms