Miles between Thornton, CO and St Marys, PA

There are
1,522 mi
from Thornton, CO to St Marys, PA

That's the driving distance. It would take 1 day 3 hours to go from Thornton, Colorado to St Marys, Pennsylvania.

The flight distance (direct flight from Thornton, CO to St Marys, PA) is 1,384.24 mi.

1,522 mi = 1.61 kms