| Romanshorn to Cividale del Friuli | 217.59 mi (350.18 km) |
| Romanshorn to Civita Castellana | 393.32 mi (632.99 km) |
| Romanshorn to Civitanova Marche | 362.93 mi (584.08 km) |
| Romanshorn to Civitavecchia | 395.97 mi (637.25 km) |
| Romanshorn to Civitella in Val di Chiana | 308.44 mi (496.39 km) |
| Romanshorn to Clusone | 119.45 mi (192.23 km) |
| Romanshorn to Coccaglio | 141.32 mi (227.44 km) |
| Romanshorn to Codigoro | 230.21 mi (370.48 km) |
| Romanshorn to Codogno | 166.90 mi (268.59 km) |
| Romanshorn to Codroipo | 204.02 mi (328.34 km) |
| Romanshorn to Cogoleto | 221.94 mi (357.18 km) |
| Romanshorn to Colle di Val d'Elsa | 300.25 mi (483.21 km) |
| Romanshorn to Colle Salvetti | 279.21 mi (449.35 km) |
| Romanshorn to Collecchio | 198.70 mi (319.78 km) |
| Romanshorn to Colleferro | 441.05 mi (709.81 km) |
