| Desborough to Opwijk | 237.01 mi (381.43 km) |
| Desborough to Ostend | 180.22 mi (290.03 km) |
| Desborough to Oud-Heverlee | 259.95 mi (418.35 km) |
| Desborough to Oud-Turnhout | 259.21 mi (417.16 km) |
| Desborough to Oudenaarde | 218.88 mi (352.25 km) |
| Desborough to Oudenburg | 184.70 mi (297.24 km) |
| Desborough to Oupeye | 301.97 mi (485.98 km) |
| Desborough to Overijse | 256.43 mi (412.69 km) |
| Desborough to Overpelt | 279.18 mi (449.30 km) |
| Desborough to Paal | 273.84 mi (440.71 km) |
| Desborough to Peer | 282.71 mi (454.98 km) |
| Desborough to Pepinster | 313.14 mi (503.95 km) |
| Desborough to Peruwelz | 231.27 mi (372.19 km) |
| Desborough to Perwez | 272.55 mi (438.63 km) |
| Desborough to Philippeville | 278.57 mi (448.31 km) |
