There are
2,028 mi
from Carlsbad, CA to Algonquin, IL
That's the driving distance. It would take 1 day 11 hours to go from Carlsbad, California to Algonquin, Illinois.
The flight distance (direct flight from Carlsbad, CA to Algonquin, IL) is 1,696.52 mi.
2,028 mi = 3.22 kms