There are
2,006 mi
from Macomb, IL to Pittsburg, CA
That's the driving distance. It would take 1 day 10 hours to go from Macomb, Illinois to Pittsburg, California.
The flight distance (direct flight from Macomb, IL to Pittsburg, CA) is 1,669.92 mi.
2,006 mi = 3,228.66 kms