| Frauenfeld to Cernavoda | 943.03 mi (1,517.66 km) |
| Frauenfeld to Chitila | 844.03 mi (1,358.34 km) |
| Frauenfeld to Cisnadie | 733.39 mi (1,180.27 km) |
| Frauenfeld to Cluj-Napoca | 690.93 mi (1,111.94 km) |
| Frauenfeld to Codlea | 793.85 mi (1,277.58 km) |
| Frauenfeld to Comanesti | 828.97 mi (1,334.09 km) |
| Frauenfeld to Comarnic | 811.37 mi (1,305.78 km) |
| Frauenfeld to Constanta | 974.98 mi (1,569.07 km) |
| Frauenfeld to Corabia | 795.70 mi (1,280.56 km) |
| Frauenfeld to Costesti | 789.32 mi (1,270.29 km) |
| Frauenfeld to Covasna | 825.70 mi (1,328.84 km) |
| Frauenfeld to Craiova | 748.99 mi (1,205.38 km) |
| Frauenfeld to Cristuru Secuiesc | 764.99 mi (1,231.13 km) |
| Frauenfeld to Cugir | 694.41 mi (1,117.54 km) |
| Frauenfeld to Cumpana | 972.72 mi (1,565.44 km) |
