| Helmstedt to Opwijk | 305.58 mi (491.78 km) |
| Helmstedt to Ostend | 352.94 mi (568.00 km) |
| Helmstedt to Oud-Heverlee | 289.09 mi (465.24 km) |
| Helmstedt to Oud-Turnhout | 265.19 mi (426.78 km) |
| Helmstedt to Oudenaarde | 332.23 mi (534.67 km) |
| Helmstedt to Oudenburg | 350.31 mi (563.77 km) |
| Helmstedt to Oupeye | 253.69 mi (408.27 km) |
| Helmstedt to Overijse | 295.79 mi (476.02 km) |
| Helmstedt to Overpelt | 249.34 mi (401.28 km) |
| Helmstedt to Paal | 263.40 mi (423.90 km) |
| Helmstedt to Peer | 249.73 mi (401.90 km) |
| Helmstedt to Pepinster | 251.53 mi (404.80 km) |
| Helmstedt to Peruwelz | 341.29 mi (549.25 km) |
| Helmstedt to Perwez | 288.89 mi (464.92 km) |
| Helmstedt to Philippeville | 312.61 mi (503.10 km) |
