There are
1,996 mi
from Tustin, CA to Romeoville, IL
That's the driving distance. It would take 1 day 10 hours to go from Tustin, California to Romeoville, Illinois.
The flight distance (direct flight from Tustin, CA to Romeoville, IL) is 1,704.94 mi.
1,996 mi = 1.61 kms