| Tonbridge to Orbetello | 794.30 mi (1,278.30 km) |
| Tonbridge to Oria | 1,110.39 mi (1,787.00 km) |
| Tonbridge to Oristano | 876.56 mi (1,410.69 km) |
| Tonbridge to Orta Nova | 1,000.48 mi (1,610.11 km) |
| Tonbridge to Orte | 829.92 mi (1,335.63 km) |
| Tonbridge to Ortona | 902.97 mi (1,453.19 km) |
| Tonbridge to Orvieto | 807.24 mi (1,299.13 km) |
| Tonbridge to Orzinuovi | 597.05 mi (960.87 km) |
| Tonbridge to Osimo | 814.24 mi (1,310.40 km) |
| Tonbridge to Ospitaletto | 594.25 mi (956.35 km) |
| Tonbridge to Ostuni | 1,096.77 mi (1,765.07 km) |
| Tonbridge to Ottaviano | 984.31 mi (1,584.09 km) |
| Tonbridge to Ovada | 595.57 mi (958.48 km) |
| Tonbridge to Ozieri | 843.58 mi (1,357.61 km) |
| Tonbridge to Paceco | 1,091.52 mi (1,756.63 km) |
