| Mariehamn to Cologno al Serio | 1,087.20 mi (1,749.69 km) |
| Mariehamn to Cologno Monzese | 1,097.54 mi (1,766.31 km) |
| Mariehamn to Colorno | 1,119.53 mi (1,801.72 km) |
| Mariehamn to Comacchio | 1,111.26 mi (1,788.40 km) |
| Mariehamn to Comiso | 1,616.79 mi (2,601.97 km) |
| Mariehamn to Como | 1,082.42 mi (1,741.99 km) |
| Mariehamn to Concordia Sagittaria | 1,031.92 mi (1,660.72 km) |
| Mariehamn to Concorezzo | 1,092.62 mi (1,758.41 km) |
| Mariehamn to Conegliano | 1,030.48 mi (1,658.39 km) |
| Mariehamn to Conselice | 1,127.78 mi (1,814.98 km) |
| Mariehamn to Conselve | 1,079.48 mi (1,737.26 km) |
| Mariehamn to Conversano | 1,327.46 mi (2,136.35 km) |
| Mariehamn to Copertino | 1,372.74 mi (2,209.22 km) |
| Mariehamn to Copparo | 1,102.15 mi (1,773.74 km) |
| Mariehamn to Corato | 1,317.99 mi (2,121.10 km) |
