| Penarth to Romeoville (Illinois) | 3,862.51 mi (6,216.12 km) |
| Penarth to Romulus (Michigan) | 3,650.91 mi (5,875.57 km) |
| Penarth to Ronkonkoma (New York) | 3,297.55 mi (5,306.89 km) |
| Penarth to Roosevelt (New York) | 3,321.79 mi (5,345.91 km) |
| Penarth to Rosamond (California) | 5,298.08 mi (8,526.44 km) |
| Penarth to Rosaryville (Maryland) | 3,538.87 mi (5,695.26 km) |
| Penarth to Roscoe (Illinois) | 3,861.27 mi (6,214.12 km) |
| Penarth to Rose Hill (Virginia) | 3,549.63 mi (5,712.58 km) |
| Penarth to Roseburg (Oregon) | 4,982.97 mi (8,019.32 km) |
| Penarth to Rosedale (California) | 5,300.95 mi (8,531.06 km) |
| Penarth to Rosedale (Maryland) | 3,501.05 mi (5,634.40 km) |
| Penarth to Roselle (Illinois) | 3,846.06 mi (6,189.64 km) |
| Penarth to Roselle (New Jersey) | 3,350.88 mi (5,392.73 km) |
| Penarth to Roselle Park (New Jersey) | 3,350.62 mi (5,392.31 km) |
| Penarth to Rosemead (California) | 5,338.53 mi (8,591.53 km) |
