| Romanshorn to Cortona | 322.54 mi (519.07 km) |
| Romanshorn to Cosenza | 666.93 mi (1,073.31 km) |
| Romanshorn to Cossato | 149.09 mi (239.93 km) |
| Romanshorn to Costa Volpino | 124.80 mi (200.84 km) |
| Romanshorn to Creazzo | 172.88 mi (278.22 km) |
| Romanshorn to Crema | 152.58 mi (245.55 km) |
| Romanshorn to Cremona | 170.98 mi (275.17 km) |
| Romanshorn to Crevalcore | 214.61 mi (345.37 km) |
| Romanshorn to Crispiano | 619.27 mi (996.62 km) |
| Romanshorn to Crosia | 664.83 mi (1,069.94 km) |
| Romanshorn to Crotone | 703.09 mi (1,131.51 km) |
| Romanshorn to Cuneo | 236.21 mi (380.15 km) |
| Romanshorn to Cuorgne | 170.73 mi (274.76 km) |
| Romanshorn to Cusano Milanino | 139.36 mi (224.28 km) |
| Romanshorn to Cutro | 702.40 mi (1,130.41 km) |
