There are
2,844 mi
from Vallejo, CA to Lansdowne, PA
That's the driving distance. It would take 2 days 1 hour to go from Vallejo, California to Lansdowne, Pennsylvania.
The flight distance (direct flight from Vallejo, CA to Lansdowne, PA) is 2,495.95 mi.
2,844 mi = 3.22 kms