| Horn-Bad Meinberg to Opwijk | 215.54 mi (346.89 km) |
| Horn-Bad Meinberg to Ostend | 263.65 mi (424.31 km) |
| Horn-Bad Meinberg to Oud-Heverlee | 199.17 mi (320.53 km) |
| Horn-Bad Meinberg to Oud-Turnhout | 175.36 mi (282.21 km) |
| Horn-Bad Meinberg to Oudenaarde | 242.20 mi (389.78 km) |
| Horn-Bad Meinberg to Oudenburg | 260.89 mi (419.86 km) |
| Horn-Bad Meinberg to Oupeye | 164.93 mi (265.43 km) |
| Horn-Bad Meinberg to Overijse | 205.88 mi (331.33 km) |
| Horn-Bad Meinberg to Overpelt | 159.31 mi (256.38 km) |
| Horn-Bad Meinberg to Paal | 173.40 mi (279.05 km) |
| Horn-Bad Meinberg to Peer | 159.71 mi (257.03 km) |
| Horn-Bad Meinberg to Pepinster | 163.85 mi (263.69 km) |
| Horn-Bad Meinberg to Peruwelz | 251.39 mi (404.58 km) |
| Horn-Bad Meinberg to Perwez | 199.46 mi (321.01 km) |
| Horn-Bad Meinberg to Philippeville | 224.31 mi (361.00 km) |
