There are
1,872 mi
from Carlsbad, CA to Swansea, IL
That's the driving distance. It would take 1 day 8 hours to go from Carlsbad, California to Swansea, Illinois.
The flight distance (direct flight from Carlsbad, CA to Swansea, IL) is 1,570.49 mi.
1,872 mi = 1.61 kms