| Riedlingen to Opwijk | 306.35 mi (493.02 km) |
| Riedlingen to Ostend | 361.46 mi (581.71 km) |
| Riedlingen to Oud-Heverlee | 284.07 mi (457.17 km) |
| Riedlingen to Oud-Turnhout | 296.38 mi (476.98 km) |
| Riedlingen to Oudenaarde | 322.50 mi (519.01 km) |
| Riedlingen to Oudenburg | 356.93 mi (574.42 km) |
| Riedlingen to Oupeye | 246.37 mi (396.49 km) |
| Riedlingen to Overijse | 286.53 mi (461.12 km) |
| Riedlingen to Overpelt | 278.51 mi (448.22 km) |
| Riedlingen to Paal | 277.01 mi (445.81 km) |
| Riedlingen to Peer | 273.15 mi (439.60 km) |
| Riedlingen to Pepinster | 234.10 mi (376.74 km) |
| Riedlingen to Peruwelz | 311.20 mi (500.83 km) |
| Riedlingen to Perwez | 270.05 mi (434.61 km) |
| Riedlingen to Philippeville | 263.35 mi (423.82 km) |
