| Llantrisant to Opwijk | 329.10 mi (529.64 km) |
| Llantrisant to Ostend | 272.21 mi (438.09 km) |
| Llantrisant to Oud-Heverlee | 351.49 mi (565.67 km) |
| Llantrisant to Oud-Turnhout | 360.20 mi (579.69 km) |
| Llantrisant to Oudenaarde | 305.64 mi (491.88 km) |
| Llantrisant to Oudenburg | 276.05 mi (444.26 km) |
| Llantrisant to Oupeye | 395.02 mi (635.73 km) |
| Llantrisant to Overijse | 346.47 mi (557.59 km) |
| Llantrisant to Overpelt | 379.58 mi (610.88 km) |
| Llantrisant to Paal | 370.76 mi (596.68 km) |
| Llantrisant to Peer | 381.90 mi (614.61 km) |
| Llantrisant to Pepinster | 404.57 mi (651.09 km) |
| Llantrisant to Peruwelz | 310.42 mi (499.58 km) |
| Llantrisant to Perwez | 360.89 mi (580.80 km) |
| Llantrisant to Philippeville | 357.57 mi (575.46 km) |
