There are
2,699 mi
from Fullerton, CA to Lansdowne, PA
That's the driving distance. It would take 2 days to go from Fullerton, California to Lansdowne, Pennsylvania.
The flight distance (direct flight from Fullerton, CA to Lansdowne, PA) is 2,370.65 mi.
2,699 mi = 4,343.58 kms