There are
2,040 mi
from Oceanside, CA to Mchenry, IL
That's the driving distance. It would take 1 day 12 hours to go from Oceanside, California to Mchenry, Illinois.
The flight distance (direct flight from Oceanside, CA to Mchenry, IL) is 1,700.40 mi.
2,040 mi = 3.22 kms