There are
2,142 mi
from Macomb, IL to Eureka, CA
That's the driving distance. It would take 1 day 13 hours to go from Macomb, Illinois to Eureka, California.
The flight distance (direct flight from Macomb, IL to Eureka, CA) is 1,745.57 mi.
2,142 mi = 3,446.43 kms