| Portsmouth to River Ridge (Louisiana) | 4,609.53 mi (7,418.32 km) |
| Portsmouth to Riverbank (California) | 5,318.42 mi (8,559.17 km) |
| Portsmouth to Riverdale (Georgia) | 4,192.51 mi (6,747.19 km) |
| Portsmouth to Riverdale (Illinois) | 3,944.08 mi (6,347.38 km) |
| Portsmouth to Riverside (California) | 5,419.97 mi (8,722.59 km) |
| Portsmouth to Riverside (Ohio) | 3,890.11 mi (6,260.53 km) |
| Portsmouth to Riverton (Utah) | 4,877.35 mi (7,849.34 km) |
| Portsmouth to Riverton (Wyoming) | 4,626.31 mi (7,445.33 km) |
| Portsmouth to Riverview (Florida) | 4,383.51 mi (7,054.58 km) |
| Portsmouth to Riverview (Michigan) | 3,746.48 mi (6,029.38 km) |
| Portsmouth to Riviera Beach (Florida) | 4,339.57 mi (6,983.87 km) |
| Portsmouth to Riviera Beach (Maryland) | 3,608.08 mi (5,806.65 km) |
| Portsmouth to Roanoke (Virginia) | 3,834.35 mi (6,170.80 km) |
| Portsmouth to Roanoke Rapids (North Carolina) | 3,776.11 mi (6,077.06 km) |
| Portsmouth to Robbinsdale (Minnesota) | 4,003.49 mi (6,443.00 km) |
