There are
2,087 mi
from Ukiah, CA to Cahokia, IL
That's the driving distance. It would take 1 day 12 hours to go from Ukiah, California to Cahokia, Illinois.
The flight distance (direct flight from Ukiah, CA to Cahokia, IL) is 1,766.98 mi.
2,087 mi = 3,359.01 kms