| Portsmouth to Shelton (Connecticut) | 3,376.11 mi (5,433.32 km) |
| Portsmouth to Shelton (Washington) | 4,839.96 mi (7,789.16 km) |
| Portsmouth to Shenandoah (Louisiana) | 4,619.43 mi (7,434.26 km) |
| Portsmouth to Shepherdsville (Kentucky) | 4,036.36 mi (6,495.90 km) |
| Portsmouth to Sheridan (Wyoming) | 4,487.75 mi (7,222.33 km) |
| Portsmouth to Sherman (Texas) | 4,681.97 mi (7,534.91 km) |
| Portsmouth to Sherrelwood (Colorado) | 4,676.10 mi (7,525.46 km) |
| Portsmouth to Sherwood (Arkansas) | 4,446.59 mi (7,156.10 km) |
| Portsmouth to Sherwood (Oregon) | 4,938.35 mi (7,947.50 km) |
| Portsmouth to Shiloh (Illinois) | 4,176.98 mi (6,722.20 km) |
| Portsmouth to Shiloh (Ohio) | 3,893.04 mi (6,265.24 km) |
| Portsmouth to Shiloh (Pennsylvania) | 3,583.77 mi (5,767.51 km) |
| Portsmouth to Shirley (New York) | 3,386.57 mi (5,450.15 km) |
| Portsmouth to Shively (Kentucky) | 4,030.86 mi (6,487.04 km) |
| Portsmouth to Shoreline (Washington) | 4,788.91 mi (7,707.01 km) |
