Miles between Round Rock, TX and Allentown, PA

There are
1,635 mi
from Round Rock, TX to Allentown, PA

That's the driving distance. It would take 1 day 5 hours to go from Round Rock, Texas to Allentown, Pennsylvania.

The flight distance (direct flight from Round Rock, TX to Allentown, PA) is 1,423.25 mi.

1,635 mi = 1.61 kms