There are
2,113 mi
from Rockford, IL to Menlo Park, CA
That's the driving distance. It would take 1 day 12 hours to go from Rockford, Illinois to Menlo Park, California.
The flight distance (direct flight from Rockford, IL to Menlo Park, CA) is 1,774.51 mi.
2,113 mi = 3.22 kms