| Grenchen to Cernavoda | 1,010.91 mi (1,626.91 km) |
| Grenchen to Chitila | 911.14 mi (1,466.33 km) |
| Grenchen to Cisnadie | 802.49 mi (1,291.48 km) |
| Grenchen to Cluj-Napoca | 762.25 mi (1,226.72 km) |
| Grenchen to Codlea | 863.45 mi (1,389.59 km) |
| Grenchen to Comanesti | 900.31 mi (1,448.91 km) |
| Grenchen to Comarnic | 880.06 mi (1,416.31 km) |
| Grenchen to Constanta | 1,042.82 mi (1,678.26 km) |
| Grenchen to Corabia | 859.70 mi (1,383.55 km) |
| Grenchen to Costesti | 856.14 mi (1,377.82 km) |
| Grenchen to Covasna | 895.89 mi (1,441.79 km) |
| Grenchen to Craiova | 814.06 mi (1,310.10 km) |
| Grenchen to Cristuru Secuiesc | 835.71 mi (1,344.94 km) |
| Grenchen to Cugir | 763.49 mi (1,228.72 km) |
| Grenchen to Cumpana | 1,040.41 mi (1,674.38 km) |
