| Rorschach to Opwijk | 340.50 mi (547.99 km) |
| Rorschach to Ostend | 393.68 mi (633.57 km) |
| Rorschach to Oud-Heverlee | 318.96 mi (513.31 km) |
| Rorschach to Oud-Turnhout | 334.56 mi (538.42 km) |
| Rorschach to Oudenaarde | 354.37 mi (570.30 km) |
| Rorschach to Oudenburg | 389.12 mi (626.24 km) |
| Rorschach to Oupeye | 283.86 mi (456.82 km) |
| Rorschach to Overijse | 320.71 mi (516.13 km) |
| Rorschach to Overpelt | 317.57 mi (511.09 km) |
| Rorschach to Paal | 314.55 mi (506.21 km) |
| Rorschach to Peer | 311.99 mi (502.09 km) |
| Rorschach to Pepinster | 271.47 mi (436.89 km) |
| Rorschach to Peruwelz | 340.94 mi (548.70 km) |
| Rorschach to Perwez | 304.20 mi (489.56 km) |
| Rorschach to Philippeville | 293.74 mi (472.73 km) |
