| Grenchen to Octeville | 447.10 mi (719.54 km) |
| Grenchen to Oignies | 302.25 mi (486.42 km) |
| Grenchen to Oissel | 325.72 mi (524.19 km) |
| Grenchen to Olivet | 260.53 mi (419.28 km) |
| Grenchen to Ollioules | 289.89 mi (466.54 km) |
| Grenchen to Olonne-sur-Mer | 435.27 mi (700.50 km) |
| Grenchen to Oloron-Sainte-Marie | 477.21 mi (767.99 km) |
| Grenchen to Onet Village | 302.66 mi (487.08 km) |
| Grenchen to Onnaing | 280.45 mi (451.33 km) |
| Grenchen to Orange | 245.07 mi (394.40 km) |
| Grenchen to Orchies | 295.12 mi (474.95 km) |
| Grenchen to Orleans | 260.54 mi (419.30 km) |
| Grenchen to Orly | 255.08 mi (410.51 km) |
| Grenchen to Ormesson-sur-Marne | 250.17 mi (402.61 km) |
| Grenchen to Orsay | 262.55 mi (422.53 km) |
