There are
1,452 mi
from Mckeesport, PA to San Marcos, TX
That's the driving distance. It would take 1 day 2 hours to go from Mckeesport, Pennsylvania to San Marcos, Texas.
The flight distance (direct flight from Mckeesport, PA to San Marcos, TX) is 1,247.60 mi.
1,452 mi = 1.61 kms