| Gross-Zimmern to Opwijk | 218.22 mi (351.18 km) |
| Gross-Zimmern to Ostend | 275.90 mi (444.03 km) |
| Gross-Zimmern to Oud-Heverlee | 195.32 mi (314.34 km) |
| Gross-Zimmern to Oud-Turnhout | 196.14 mi (315.66 km) |
| Gross-Zimmern to Oudenaarde | 240.34 mi (386.78 km) |
| Gross-Zimmern to Oudenburg | 271.70 mi (437.26 km) |
| Gross-Zimmern to Oupeye | 152.23 mi (244.99 km) |
| Gross-Zimmern to Overijse | 199.84 mi (321.61 km) |
| Gross-Zimmern to Overpelt | 176.44 mi (283.96 km) |
| Gross-Zimmern to Paal | 180.08 mi (289.82 km) |
| Gross-Zimmern to Peer | 172.18 mi (277.10 km) |
| Gross-Zimmern to Pepinster | 141.75 mi (228.13 km) |
| Gross-Zimmern to Peruwelz | 236.44 mi (380.51 km) |
| Gross-Zimmern to Perwez | 184.99 mi (297.71 km) |
| Gross-Zimmern to Philippeville | 191.45 mi (308.10 km) |
