There are
1,777 mi
from Nashua, NH to Seagoville, TX
That's the driving distance. It would take 1 day 9 hours to go from Nashua, New Hampshire to Seagoville, Texas.
The flight distance (direct flight from Nashua, NH to Seagoville, TX) is 1,530.62 mi.
1,777 mi = 1.61 kms