There are
1,845 mi
from Downey, CA to Swansea, IL
That's the driving distance. It would take 1 day 8 hours to go from Downey, California to Swansea, Illinois.
The flight distance (direct flight from Downey, CA to Swansea, IL) is 1,593.68 mi.
1,845 mi = 1.61 kms