| Pontypridd to Orbetello | 930.03 mi (1,496.74 km) |
| Pontypridd to Oria | 1,257.29 mi (2,023.41 km) |
| Pontypridd to Oristano | 989.26 mi (1,592.07 km) |
| Pontypridd to Orta Nova | 1,145.56 mi (1,843.60 km) |
| Pontypridd to Orte | 969.82 mi (1,560.78 km) |
| Pontypridd to Ortona | 1,048.08 mi (1,686.71 km) |
| Pontypridd to Orvieto | 947.26 mi (1,524.46 km) |
| Pontypridd to Orzinuovi | 741.85 mi (1,193.88 km) |
| Pontypridd to Osimo | 960.91 mi (1,546.44 km) |
| Pontypridd to Ospitaletto | 740.23 mi (1,191.28 km) |
| Pontypridd to Ostuni | 1,244.14 mi (2,002.25 km) |
| Pontypridd to Ottaviano | 1,124.83 mi (1,810.24 km) |
| Pontypridd to Ovada | 731.30 mi (1,176.91 km) |
| Pontypridd to Ozieri | 961.28 mi (1,547.03 km) |
| Pontypridd to Paceco | 1,216.27 mi (1,957.40 km) |
