| Portsmouth to Scottsboro (Alabama) | 4,208.27 mi (6,772.55 km) |
| Portsmouth to Scottsdale (Arizona) | 5,245.35 mi (8,441.58 km) |
| Portsmouth to Scranton (Pennsylvania) | 3,476.16 mi (5,594.34 km) |
| Portsmouth to Seabrook (Maryland) | 3,629.52 mi (5,841.14 km) |
| Portsmouth to Seabrook (Texas) | 4,824.87 mi (7,764.88 km) |
| Portsmouth to Seaford (New York) | 3,417.51 mi (5,499.96 km) |
| Portsmouth to Seagoville (Texas) | 4,728.46 mi (7,609.72 km) |
| Portsmouth to Seal Beach (California) | 5,452.71 mi (8,775.30 km) |
| Portsmouth to Searcy (Arkansas) | 4,408.77 mi (7,095.23 km) |
| Portsmouth to Seaside (California) | 5,408.62 mi (8,704.34 km) |
| Portsmouth to SeaTac (Washington) | 4,805.33 mi (7,733.44 km) |
| Portsmouth to Seattle (Washington) | 4,796.06 mi (7,718.51 km) |
| Portsmouth to Sebastian (Florida) | 4,307.65 mi (6,932.50 km) |
| Portsmouth to Sebring (Florida) | 4,364.32 mi (7,023.69 km) |
| Portsmouth to Secaucus (New Jersey) | 3,436.54 mi (5,530.58 km) |
