| Snaresbrook to Orbetello | 821.37 mi (1,321.87 km) |
| Snaresbrook to Oria | 1,135.09 mi (1,826.75 km) |
| Snaresbrook to Oristano | 905.42 mi (1,457.13 km) |
| Snaresbrook to Orta Nova | 1,025.70 mi (1,650.70 km) |
| Snaresbrook to Orte | 856.32 mi (1,378.11 km) |
| Snaresbrook to Ortona | 928.24 mi (1,493.86 km) |
| Snaresbrook to Orvieto | 833.64 mi (1,341.61 km) |
| Snaresbrook to Orzinuovi | 622.69 mi (1,002.13 km) |
| Snaresbrook to Osimo | 839.18 mi (1,350.54 km) |
| Snaresbrook to Ospitaletto | 619.60 mi (997.15 km) |
| Snaresbrook to Ostuni | 1,121.34 mi (1,804.63 km) |
| Snaresbrook to Ottaviano | 1,010.50 mi (1,626.24 km) |
| Snaresbrook to Ovada | 622.83 mi (1,002.35 km) |
| Snaresbrook to Ozieri | 872.23 mi (1,403.72 km) |
| Snaresbrook to Paceco | 1,119.62 mi (1,801.86 km) |
