There are
2,430 mi
from Downey, CA to West Mifflin, PA
That's the driving distance. It would take 1 day 19 hours to go from Downey, California to West Mifflin, Pennsylvania.
The flight distance (direct flight from Downey, CA to West Mifflin, PA) is 2,136.25 mi.
2,430 mi = 3,911.20 kms