| Mariehamn to Cosenza | 1,446.00 mi (2,327.11 km) |
| Mariehamn to Cossato | 1,113.98 mi (1,792.78 km) |
| Mariehamn to Costa Volpino | 1,064.80 mi (1,713.64 km) |
| Mariehamn to Creazzo | 1,064.49 mi (1,713.13 km) |
| Mariehamn to Crema | 1,101.62 mi (1,772.89 km) |
| Mariehamn to Cremona | 1,111.54 mi (1,788.85 km) |
| Mariehamn to Crevalcore | 1,123.21 mi (1,807.63 km) |
| Mariehamn to Crispiano | 1,352.29 mi (2,176.31 km) |
| Mariehamn to Crosia | 1,425.32 mi (2,293.83 km) |
| Mariehamn to Crotone | 1,457.26 mi (2,345.24 km) |
| Mariehamn to Cuneo | 1,201.11 mi (1,933.00 km) |
| Mariehamn to Cuorgne | 1,134.62 mi (1,825.99 km) |
| Mariehamn to Cusano Milanino | 1,097.70 mi (1,766.58 km) |
| Mariehamn to Cutro | 1,461.25 mi (2,351.65 km) |
| Mariehamn to Cutrofiano | 1,382.73 mi (2,225.29 km) |
