| Radford to Orbetello | 4,636.36 mi (7,461.49 km) |
| Radford to Oria | 4,989.07 mi (8,029.14 km) |
| Radford to Oristano | 4,605.49 mi (7,411.82 km) |
| Radford to Orta Nova | 4,873.70 mi (7,843.47 km) |
| Radford to Orte | 4,687.23 mi (7,543.37 km) |
| Radford to Ortona | 4,779.02 mi (7,691.09 km) |
| Radford to Orvieto | 4,666.08 mi (7,509.33 km) |
| Radford to Orzinuovi | 4,481.01 mi (7,211.49 km) |
| Radford to Osimo | 4,698.66 mi (7,561.76 km) |
| Radford to Ospitaletto | 4,481.90 mi (7,212.92 km) |
| Radford to Ostuni | 4,977.89 mi (8,011.14 km) |
| Radford to Ottaviano | 4,837.42 mi (7,785.07 km) |
| Radford to Ovada | 4,450.28 mi (7,162.03 km) |
| Radford to Ozieri | 4,601.10 mi (7,404.75 km) |
| Radford to Paceco | 4,856.20 mi (7,815.29 km) |
