| Aldenham to Orbetello | 836.67 mi (1,346.49 km) |
| Aldenham to Oria | 1,151.42 mi (1,853.03 km) |
| Aldenham to Oristano | 918.59 mi (1,478.32 km) |
| Aldenham to Orta Nova | 1,041.87 mi (1,676.73 km) |
| Aldenham to Orte | 872.01 mi (1,403.36 km) |
| Aldenham to Ortona | 944.39 mi (1,519.85 km) |
| Aldenham to Orvieto | 849.32 mi (1,366.86 km) |
| Aldenham to Orzinuovi | 638.70 mi (1,027.89 km) |
| Aldenham to Osimo | 855.44 mi (1,376.69 km) |
| Aldenham to Ospitaletto | 635.71 mi (1,023.08 km) |
| Aldenham to Ostuni | 1,137.71 mi (1,830.96 km) |
| Aldenham to Ottaviano | 1,026.29 mi (1,651.65 km) |
| Aldenham to Ovada | 638.00 mi (1,026.76 km) |
| Aldenham to Ozieri | 885.86 mi (1,425.66 km) |
| Aldenham to Paceco | 1,134.04 mi (1,825.06 km) |
