There are
1,940 mi
from Macomb, IL to Oceanside, CA
That's the driving distance. It would take 1 day 10 hours to go from Macomb, Illinois to Oceanside, California.
The flight distance (direct flight from Macomb, IL to Oceanside, CA) is 1,552.84 mi.
1,940 mi = 3,121.67 kms