By road, aprox 240 miles
From Portsmouth RI its 374 miles From Portsmouth NH its 433 miles
20 miles taking M27 PORTSMOUTH.
Answer By road, the distance from Portsmouth to Glasgow in Scotland is about 450 miles.
The distance between Portsmouth and Brighton is about 47 miles.
73.7 miles
448 miles
446 miles
About 600
106 miles
74 miles
It is 638 miles according to Google Maps.
The shortest distance is 100.9 miles