| Portsmouth to Salisbury (New York) | 3,417.08 mi (5,499.26 km) |
| Portsmouth to Salisbury (North Carolina) | 3,930.53 mi (6,325.57 km) |
| Portsmouth to Salmon Creek (Washington) | 4,913.48 mi (7,907.48 km) |
| Portsmouth to Salt Lake City (Utah) | 4,862.29 mi (7,825.09 km) |
| Portsmouth to Sammamish (Washington) | 4,789.53 mi (7,708.01 km) |
| Portsmouth to San Angelo (Texas) | 4,943.28 mi (7,955.44 km) |
| Portsmouth to San Anselmo (California) | 5,353.19 mi (8,615.12 km) |
| Portsmouth to San Antonio (Texas) | 4,970.69 mi (7,999.55 km) |
| Portsmouth to San Benito (Texas) | 5,109.22 mi (8,222.49 km) |
| Portsmouth to San Bernardino (California) | 5,405.17 mi (8,698.77 km) |
| Portsmouth to San Bruno (California) | 5,369.54 mi (8,641.44 km) |
| Portsmouth to San Buenaventura (California) | 5,461.14 mi (8,788.85 km) |
| Portsmouth to San Carlos (California) | 5,371.92 mi (8,645.28 km) |
| Portsmouth to San Carlos Park (Florida) | 4,429.66 mi (7,128.85 km) |
| Portsmouth to San Clemente (California) | 5,454.66 mi (8,778.42 km) |
