| Romanshorn to Cognac | 476.96 mi (767.60 km) |
| Romanshorn to Cogolin | 327.84 mi (527.61 km) |
| Romanshorn to Colmar | 99.48 mi (160.10 km) |
| Romanshorn to Colombes | 339.98 mi (547.15 km) |
| Romanshorn to Colomiers | 473.77 mi (762.47 km) |
| Romanshorn to Combs-la-Ville | 322.57 mi (519.12 km) |
| Romanshorn to Comines | 361.85 mi (582.33 km) |
| Romanshorn to Compiegne | 325.23 mi (523.41 km) |
| Romanshorn to Concarneau | 616.70 mi (992.48 km) |
| Romanshorn to Conde-sur-l'Escaut | 328.54 mi (528.74 km) |
| Romanshorn to Conflans-Sainte-Honorine | 348.00 mi (560.05 km) |
| Romanshorn to Corbas | 248.62 mi (400.12 km) |
| Romanshorn to Corbeil-Essonnes | 325.35 mi (523.59 km) |
| Romanshorn to Cormeilles-en-Parisis | 343.04 mi (552.07 km) |
| Romanshorn to Cosne sur Loire | 300.39 mi (483.42 km) |
