There are
2,146 mi
from San Leandro, CA to Deerfield, IL
That's the driving distance. It would take 1 day 13 hours to go from San Leandro, California to Deerfield, Illinois.
The flight distance (direct flight from San Leandro, CA to Deerfield, IL) is 1,830.56 mi.
2,146 mi = 3.22 kms