| Pontypridd to Opwijk | 328.00 mi (527.87 km) |
| Pontypridd to Ostend | 270.99 mi (436.11 km) |
| Pontypridd to Oud-Heverlee | 350.46 mi (564.01 km) |
| Pontypridd to Oud-Turnhout | 358.75 mi (577.35 km) |
| Pontypridd to Oudenaarde | 304.72 mi (490.39 km) |
| Pontypridd to Oudenburg | 274.86 mi (442.34 km) |
| Pontypridd to Oupeye | 393.99 mi (634.06 km) |
| Pontypridd to Overijse | 345.49 mi (556.01 km) |
| Pontypridd to Overpelt | 378.18 mi (608.63 km) |
| Pontypridd to Paal | 369.51 mi (594.67 km) |
| Pontypridd to Peer | 380.56 mi (612.46 km) |
| Pontypridd to Pepinster | 403.62 mi (649.56 km) |
| Pontypridd to Peruwelz | 309.82 mi (498.60 km) |
| Pontypridd to Perwez | 360.01 mi (579.38 km) |
| Pontypridd to Philippeville | 357.07 mi (574.65 km) |
