| Romanshorn to Carmona | 1,030.83 mi (1,658.97 km) |
| Romanshorn to Cartagena | 864.71 mi (1,391.62 km) |
| Romanshorn to Cartama | 1,034.07 mi (1,664.17 km) |
| Romanshorn to Cartaya | 1,097.43 mi (1,766.15 km) |
| Romanshorn to Caspe | 636.46 mi (1,024.28 km) |
| Romanshorn to Cassa de la Selva | 504.56 mi (812.01 km) |
| Romanshorn to Castalla | 798.56 mi (1,285.16 km) |
| Romanshorn to Castellbisbal | 555.22 mi (893.54 km) |
| Romanshorn to Castelldefels | 566.12 mi (911.09 km) |
| Romanshorn to Castello de Ampurias | 478.05 mi (769.35 km) |
| Romanshorn to Castellon de la Plana | 701.66 mi (1,129.21 km) |
| Romanshorn to Castilleja de la Cuesta | 1,050.62 mi (1,690.81 km) |
| Romanshorn to Catarroja | 745.39 mi (1,199.58 km) |
| Romanshorn to Catral | 827.39 mi (1,331.56 km) |
| Romanshorn to Caudete | 802.75 mi (1,291.90 km) |
