| Mariehamn to Cartagena | 1,804.87 mi (2,904.67 km) |
| Mariehamn to Cartama | 1,945.38 mi (3,130.78 km) |
| Mariehamn to Cartaya | 1,973.79 mi (3,176.50 km) |
| Mariehamn to Caspe | 1,556.04 mi (2,504.20 km) |
| Mariehamn to Cassa de la Selva | 1,450.89 mi (2,334.98 km) |
| Mariehamn to Castalla | 1,735.11 mi (2,792.39 km) |
| Mariehamn to Castellbisbal | 1,495.84 mi (2,407.32 km) |
| Mariehamn to Castelldefels | 1,508.33 mi (2,427.41 km) |
| Mariehamn to Castello de Ampurias | 1,423.43 mi (2,290.78 km) |
| Mariehamn to Castellon de la Plana | 1,633.84 mi (2,629.42 km) |
| Mariehamn to Castilleja de la Cuesta | 1,939.32 mi (3,121.03 km) |
| Mariehamn to Catarroja | 1,678.53 mi (2,701.33 km) |
| Mariehamn to Catral | 1,765.64 mi (2,841.52 km) |
| Mariehamn to Caudete | 1,735.47 mi (2,792.97 km) |
| Mariehamn to Cehegin | 1,792.30 mi (2,884.42 km) |
