There are
2,057 mi
from Rockford, IL to Antioch, CA
That's the driving distance. It would take 1 day 11 hours to go from Rockford, Illinois to Antioch, California.
The flight distance (direct flight from Rockford, IL to Antioch, CA) is 1,741.83 mi.
2,057 mi = 3,310.07 kms