| Aberbargoed to Orbetello | 930.00 mi (1,496.70 km) |
| Aberbargoed to Oria | 1,256.12 mi (2,021.53 km) |
| Aberbargoed to Oristano | 991.08 mi (1,595.00 km) |
| Aberbargoed to Orta Nova | 1,144.60 mi (1,842.06 km) |
| Aberbargoed to Orte | 969.40 mi (1,560.09 km) |
| Aberbargoed to Ortona | 1,047.09 mi (1,685.14 km) |
| Aberbargoed to Orvieto | 946.81 mi (1,523.75 km) |
| Aberbargoed to Orzinuovi | 740.80 mi (1,192.20 km) |
| Aberbargoed to Osimo | 959.72 mi (1,544.52 km) |
| Aberbargoed to Ospitaletto | 739.04 mi (1,189.38 km) |
| Aberbargoed to Ostuni | 1,242.91 mi (2,000.27 km) |
| Aberbargoed to Ottaviano | 1,124.38 mi (1,809.52 km) |
| Aberbargoed to Ovada | 731.17 mi (1,176.71 km) |
| Aberbargoed to Ozieri | 962.74 mi (1,549.37 km) |
| Aberbargoed to Paceco | 1,217.29 mi (1,959.03 km) |
