There are
1,818 mi
from Port Arthur, TX to Somersworth, NH
That's the driving distance. It would take 1 day 10 hours to go from Port Arthur, Texas to Somersworth, New Hampshire.
The flight distance (direct flight from Port Arthur, TX to Somersworth, NH) is 1,570.29 mi.
1,818 mi = 2,926.57 kms