| Portsmouth to Security-Widefield (Colorado) | 4,722.39 mi (7,599.96 km) |
| Portsmouth to Sedalia (Missouri) | 4,298.63 mi (6,917.98 km) |
| Portsmouth to Sedro-Woolley (Washington) | 4,743.45 mi (7,633.84 km) |
| Portsmouth to Seguin (Texas) | 4,942.08 mi (7,953.51 km) |
| Portsmouth to Selden (New York) | 3,390.45 mi (5,456.40 km) |
| Portsmouth to Selma (Alabama) | 4,356.52 mi (7,011.14 km) |
| Portsmouth to Selma (California) | 5,342.78 mi (8,598.37 km) |
| Portsmouth to Selma (Texas) | 4,955.93 mi (7,975.80 km) |
| Portsmouth to Seminole (Florida) | 4,403.02 mi (7,085.97 km) |
| Portsmouth to Seven Hills (Ohio) | 3,720.78 mi (5,988.02 km) |
| Portsmouth to Seven Oaks (South Carolina) | 4,033.45 mi (6,491.21 km) |
| Portsmouth to Severn (Maryland) | 3,616.30 mi (5,819.87 km) |
| Portsmouth to Severna Park (Maryland) | 3,613.16 mi (5,814.82 km) |
| Portsmouth to Sevierville (Tennessee) | 4,047.51 mi (6,513.83 km) |
| Portsmouth to Seymour (Indiana) | 3,999.15 mi (6,436.01 km) |
