There are
1,898 mi
from Markham, IL to Barstow, CA
That's the driving distance. It would take 1 day 9 hours to go from Markham, Illinois to Barstow, California.
The flight distance (direct flight from Markham, IL to Barstow, CA) is 1,648.08 mi.
1,898 mi = 3,055.06 kms