| Portsmouth to Rockville (Maryland) | 3,637.62 mi (5,854.18 km) |
| Portsmouth to Rockville Centre (New York) | 3,423.73 mi (5,509.96 km) |
| Portsmouth to Rockwall (Texas) | 4,710.78 mi (7,581.27 km) |
| Portsmouth to Rocky Mount (North Carolina) | 3,804.32 mi (6,122.46 km) |
| Portsmouth to Rocky Point (New York) | 3,383.18 mi (5,444.70 km) |
| Portsmouth to Rocky River (Ohio) | 3,723.99 mi (5,993.19 km) |
| Portsmouth to Roessleville (New York) | 3,345.87 mi (5,384.66 km) |
| Portsmouth to Rogers (Arkansas) | 4,451.01 mi (7,163.21 km) |
| Portsmouth to Rogers (Minnesota) | 4,005.00 mi (6,445.43 km) |
| Portsmouth to Rohnert Park (California) | 5,335.91 mi (8,587.31 km) |
| Portsmouth to Rolla (Missouri) | 4,278.24 mi (6,885.16 km) |
| Portsmouth to Rolling Meadows (Illinois) | 3,939.50 mi (6,340.01 km) |
| Portsmouth to Roma (Texas) | 5,149.16 mi (8,286.76 km) |
| Portsmouth to Rome (Georgia) | 4,190.92 mi (6,744.63 km) |
| Portsmouth to Rome (New York) | 3,393.28 mi (5,460.95 km) |
