| Portsmouth to Romeoville (Illinois) | 3,962.59 mi (6,377.17 km) |
| Portsmouth to Romulus (Michigan) | 3,750.99 mi (6,036.63 km) |
| Portsmouth to Ronkonkoma (New York) | 3,396.53 mi (5,466.18 km) |
| Portsmouth to Roosevelt (New York) | 3,420.81 mi (5,505.27 km) |
| Portsmouth to Rosamond (California) | 5,394.56 mi (8,681.71 km) |
| Portsmouth to Rosaryville (Maryland) | 3,637.91 mi (5,854.65 km) |
| Portsmouth to Roscoe (Illinois) | 3,961.27 mi (6,375.05 km) |
| Portsmouth to Rose Hill (Virginia) | 3,648.72 mi (5,872.05 km) |
| Portsmouth to Roseburg (Oregon) | 5,074.59 mi (8,166.76 km) |
| Portsmouth to Rosedale (California) | 5,396.96 mi (8,685.57 km) |
| Portsmouth to Rosedale (Maryland) | 3,600.18 mi (5,793.93 km) |
| Portsmouth to Roselle (Illinois) | 3,946.12 mi (6,350.67 km) |
| Portsmouth to Roselle (New Jersey) | 3,450.00 mi (5,552.24 km) |
| Portsmouth to Roselle Park (New Jersey) | 3,449.75 mi (5,551.83 km) |
| Portsmouth to Rosemead (California) | 5,435.27 mi (8,747.22 km) |
