| Bargoed to Orbetello | 930.26 mi (1,497.10 km) |
| Bargoed to Oria | 1,256.48 mi (2,022.11 km) |
| Bargoed to Oristano | 991.16 mi (1,595.11 km) |
| Bargoed to Orta Nova | 1,144.95 mi (1,842.61 km) |
| Bargoed to Orte | 969.69 mi (1,560.56 km) |
| Bargoed to Ortona | 1,047.44 mi (1,685.69 km) |
| Bargoed to Orvieto | 947.11 mi (1,524.22 km) |
| Bargoed to Orzinuovi | 741.15 mi (1,192.76 km) |
| Bargoed to Osimo | 960.08 mi (1,545.10 km) |
| Bargoed to Ospitaletto | 739.41 mi (1,189.96 km) |
| Bargoed to Ostuni | 1,243.28 mi (2,000.86 km) |
| Bargoed to Ottaviano | 1,124.68 mi (1,809.99 km) |
| Bargoed to Ovada | 731.44 mi (1,177.13 km) |
| Bargoed to Ozieri | 962.84 mi (1,549.55 km) |
| Bargoed to Paceco | 1,217.44 mi (1,959.28 km) |
