| Birkenfeld to Opwijk | 245.36 mi (394.86 km) |
| Birkenfeld to Ostend | 301.26 mi (484.82 km) |
| Birkenfeld to Oud-Heverlee | 222.83 mi (358.61 km) |
| Birkenfeld to Oud-Turnhout | 234.04 mi (376.65 km) |
| Birkenfeld to Oudenaarde | 262.67 mi (422.72 km) |
| Birkenfeld to Oudenburg | 296.76 mi (477.59 km) |
| Birkenfeld to Oupeye | 184.26 mi (296.54 km) |
| Birkenfeld to Overijse | 225.61 mi (363.08 km) |
| Birkenfeld to Overpelt | 216.07 mi (347.73 km) |
| Birkenfeld to Paal | 214.83 mi (345.74 km) |
| Birkenfeld to Peer | 210.74 mi (339.15 km) |
| Birkenfeld to Pepinster | 172.06 mi (276.90 km) |
| Birkenfeld to Peruwelz | 252.81 mi (406.86 km) |
| Birkenfeld to Perwez | 209.23 mi (336.73 km) |
| Birkenfeld to Philippeville | 204.95 mi (329.83 km) |
