| Obersiggenthal to Opwijk | 303.51 mi (488.45 km) |
| Obersiggenthal to Ostend | 353.65 mi (569.15 km) |
| Obersiggenthal to Oud-Heverlee | 283.28 mi (455.90 km) |
| Obersiggenthal to Oud-Turnhout | 303.49 mi (488.42 km) |
| Obersiggenthal to Oudenaarde | 314.40 mi (505.98 km) |
| Obersiggenthal to Oudenburg | 349.11 mi (561.84 km) |
| Obersiggenthal to Oupeye | 252.75 mi (406.76 km) |
| Obersiggenthal to Overijse | 284.08 mi (457.18 km) |
| Obersiggenthal to Overpelt | 288.32 mi (464.01 km) |
| Obersiggenthal to Paal | 282.82 mi (455.16 km) |
| Obersiggenthal to Peer | 282.45 mi (454.56 km) |
| Obersiggenthal to Pepinster | 240.50 mi (387.05 km) |
| Obersiggenthal to Peruwelz | 298.85 mi (480.95 km) |
| Obersiggenthal to Perwez | 267.84 mi (431.04 km) |
| Obersiggenthal to Philippeville | 253.10 mi (407.33 km) |
