There are
2,049 mi
from Napa, CA to Swansea, IL
That's the driving distance. It would take 1 day 11 hours to go from Napa, California to Swansea, Illinois.
The flight distance (direct flight from Napa, CA to Swansea, IL) is 1,740.01 mi.
2,049 mi = 3.22 kms