| Waltham Abbey to Orbetello | 826.65 mi (1,330.36 km) |
| Waltham Abbey to Oria | 1,139.51 mi (1,833.87 km) |
| Waltham Abbey to Oristano | 911.55 mi (1,467.00 km) |
| Waltham Abbey to Orta Nova | 1,030.30 mi (1,658.11 km) |
| Waltham Abbey to Orte | 861.34 mi (1,386.20 km) |
| Waltham Abbey to Ortona | 932.87 mi (1,501.31 km) |
| Waltham Abbey to Orvieto | 838.66 mi (1,349.69 km) |
| Waltham Abbey to Orzinuovi | 627.47 mi (1,009.81 km) |
| Waltham Abbey to Osimo | 843.70 mi (1,357.81 km) |
| Waltham Abbey to Ospitaletto | 624.28 mi (1,004.68 km) |
| Waltham Abbey to Ostuni | 1,125.73 mi (1,811.68 km) |
| Waltham Abbey to Ottaviano | 1,015.44 mi (1,634.19 km) |
| Waltham Abbey to Ovada | 628.19 mi (1,010.98 km) |
| Waltham Abbey to Ozieri | 878.23 mi (1,413.38 km) |
| Waltham Abbey to Paceco | 1,125.33 mi (1,811.04 km) |
