There are
1,996 mi
from Nashua, NH to San Marcos, TX
That's the driving distance. It would take 1 day 12 hours to go from Nashua, New Hampshire to San Marcos, Texas.
The flight distance (direct flight from Nashua, NH to San Marcos, TX) is 1,710.63 mi.
1,996 mi = 1.61 kms