There are
2,016 mi
from Downey, CA to Rantoul, IL
That's the driving distance. It would take 1 day 11 hours to go from Downey, California to Rantoul, Illinois.
The flight distance (direct flight from Downey, CA to Rantoul, IL) is 1,700.07 mi.
2,016 mi = 3,243.75 kms