| Celtik to Opwijk | 1,567.25 mi (2,522.24 km) |
| Celtik to Ostend | 1,624.89 mi (2,615.00 km) |
| Celtik to Oud-Heverlee | 1,544.28 mi (2,485.27 km) |
| Celtik to Oud-Turnhout | 1,544.11 mi (2,485.01 km) |
| Celtik to Oudenaarde | 1,588.23 mi (2,556.01 km) |
| Celtik to Oudenburg | 1,620.61 mi (2,608.11 km) |
| Celtik to Oupeye | 1,501.46 mi (2,416.37 km) |
| Celtik to Overijse | 1,548.46 mi (2,492.00 km) |
| Celtik to Overpelt | 1,524.16 mi (2,452.91 km) |
| Celtik to Paal | 1,529.14 mi (2,460.92 km) |
| Celtik to Peer | 1,520.41 mi (2,446.87 km) |
| Celtik to Pepinster | 1,490.71 mi (2,399.07 km) |
| Celtik to Peruwelz | 1,581.19 mi (2,544.68 km) |
| Celtik to Perwez | 1,533.00 mi (2,467.13 km) |
| Celtik to Philippeville | 1,533.72 mi (2,468.29 km) |
