| Grenchen to Oerlinghausen | 334.85 mi (538.89 km) |
| Grenchen to Oestrich-Winkel | 196.06 mi (315.53 km) |
| Grenchen to Offenburg | 91.62 mi (147.45 km) |
| Grenchen to Oftersheim | 160.22 mi (257.85 km) |
| Grenchen to Ohrdruf | 293.24 mi (471.92 km) |
| Grenchen to Ohringen | 169.28 mi (272.44 km) |
| Grenchen to Olbernhau | 360.79 mi (580.63 km) |
| Grenchen to Olching | 195.17 mi (314.09 km) |
| Grenchen to Oldenburg | 412.91 mi (664.52 km) |
| Grenchen to Oldenburg in Holstein | 514.16 mi (827.46 km) |
| Grenchen to Olfen | 312.72 mi (503.28 km) |
| Grenchen to Olpe | 265.09 mi (426.63 km) |
| Grenchen to Olsberg | 291.52 mi (469.16 km) |
| Grenchen to Oranienburg | 463.49 mi (745.92 km) |
| Grenchen to Ortenberg | 231.36 mi (372.33 km) |
