There are
2,148 mi
from Redwood City, CA to Mchenry, IL
That's the driving distance. It would take 1 day 13 hours to go from Redwood City, California to Mchenry, Illinois.
The flight distance (direct flight from Redwood City, CA to Mchenry, IL) is 1,818.70 mi.
2,148 mi = 3,456.28 kms