| Rorschach to Oerlinghausen | 313.13 mi (503.94 km) |
| Rorschach to Oestrich-Winkel | 187.90 mi (302.39 km) |
| Rorschach to Offenburg | 100.13 mi (161.15 km) |
| Rorschach to Oftersheim | 138.08 mi (222.21 km) |
| Rorschach to Ohrdruf | 238.83 mi (384.36 km) |
| Rorschach to Ohringen | 119.76 mi (192.73 km) |
| Rorschach to Olbernhau | 280.98 mi (452.20 km) |
| Rorschach to Olching | 98.32 mi (158.23 km) |
| Rorschach to Oldenburg | 396.32 mi (637.82 km) |
| Rorschach to Oldenburg in Holstein | 475.95 mi (765.96 km) |
| Rorschach to Olfen | 308.54 mi (496.54 km) |
| Rorschach to Olpe | 256.53 mi (412.84 km) |
| Rorschach to Olsberg | 272.17 mi (438.01 km) |
| Rorschach to Oranienburg | 400.98 mi (645.32 km) |
| Rorschach to Ortenberg | 200.64 mi (322.89 km) |
