There are
2,124 mi
from Hayward, CA to Romeoville, IL
That's the driving distance. It would take 1 day 12 hours to go from Hayward, California to Romeoville, Illinois.
The flight distance (direct flight from Hayward, CA to Romeoville, IL) is 1,816.88 mi.
2,124 mi = 3.22 kms