| Gross-Gerau to Opwijk | 202.61 mi (326.07 km) |
| Gross-Gerau to Ostend | 260.30 mi (418.91 km) |
| Gross-Gerau to Oud-Heverlee | 179.69 mi (289.18 km) |
| Gross-Gerau to Oud-Turnhout | 181.32 mi (291.81 km) |
| Gross-Gerau to Oudenaarde | 224.57 mi (361.41 km) |
| Gross-Gerau to Oudenburg | 256.07 mi (412.11 km) |
| Gross-Gerau to Oupeye | 136.72 mi (220.03 km) |
| Gross-Gerau to Overijse | 184.14 mi (296.34 km) |
| Gross-Gerau to Overpelt | 161.75 mi (260.30 km) |
| Gross-Gerau to Paal | 164.89 mi (265.37 km) |
| Gross-Gerau to Peer | 157.34 mi (253.21 km) |
| Gross-Gerau to Pepinster | 126.10 mi (202.94 km) |
| Gross-Gerau to Peruwelz | 220.56 mi (354.96 km) |
| Gross-Gerau to Perwez | 169.21 mi (272.32 km) |
| Gross-Gerau to Philippeville | 175.60 mi (282.60 km) |
