| Illertissen to Opwijk | 325.31 mi (523.54 km) |
| Illertissen to Ostend | 381.35 mi (613.73 km) |
| Illertissen to Oud-Heverlee | 302.69 mi (487.14 km) |
| Illertissen to Oud-Turnhout | 312.40 mi (502.76 km) |
| Illertissen to Oudenaarde | 342.78 mi (551.64 km) |
| Illertissen to Oudenburg | 376.86 mi (606.50 km) |
| Illertissen to Oupeye | 263.35 mi (423.82 km) |
| Illertissen to Overijse | 305.60 mi (491.81 km) |
| Illertissen to Overpelt | 293.87 mi (472.94 km) |
| Illertissen to Paal | 293.70 mi (472.67 km) |
| Illertissen to Peer | 288.76 mi (464.72 km) |
| Illertissen to Pepinster | 251.29 mi (404.40 km) |
| Illertissen to Peruwelz | 332.68 mi (535.40 km) |
| Illertissen to Perwez | 289.26 mi (465.52 km) |
| Illertissen to Philippeville | 284.79 mi (458.32 km) |
