Miles between Boulder, CO and St Marys, PA

There are
1,542 mi
from Boulder, CO to St Marys, PA

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

The flight distance (direct flight from Boulder, CO to St Marys, PA) is 1,397.41 mi.

1,542 mi = 1.61 kms