| Castelnau-le-Lez to Opwijk | 506.61 mi (815.31 km) |
| Castelnau-le-Lez to Ostend | 526.34 mi (847.06 km) |
| Castelnau-le-Lez to Oud-Heverlee | 498.51 mi (802.27 km) |
| Castelnau-le-Lez to Oud-Turnhout | 533.00 mi (857.79 km) |
| Castelnau-le-Lez to Oudenaarde | 498.58 mi (802.38 km) |
| Castelnau-le-Lez to Oudenburg | 523.10 mi (841.84 km) |
| Castelnau-le-Lez to Oupeye | 495.34 mi (797.18 km) |
| Castelnau-le-Lez to Overijse | 494.65 mi (796.07 km) |
| Castelnau-le-Lez to Overpelt | 528.45 mi (850.45 km) |
| Castelnau-le-Lez to Paal | 514.88 mi (828.62 km) |
| Castelnau-le-Lez to Peer | 522.95 mi (841.60 km) |
| Castelnau-le-Lez to Pepinster | 487.15 mi (784.00 km) |
| Castelnau-le-Lez to Peruwelz | 475.58 mi (765.38 km) |
| Castelnau-le-Lez to Perwez | 484.66 mi (779.99 km) |
| Castelnau-le-Lez to Philippeville | 454.49 mi (731.43 km) |
