| Mariehamn to Chitila | 1,106.06 mi (1,780.03 km) |
| Mariehamn to Cisnadie | 1,008.97 mi (1,623.78 km) |
| Mariehamn to Cluj-Napoca | 933.06 mi (1,501.61 km) |
| Mariehamn to Codlea | 1,020.45 mi (1,642.26 km) |
| Mariehamn to Comanesti | 981.02 mi (1,578.80 km) |
| Mariehamn to Comarnic | 1,052.45 mi (1,693.75 km) |
| Mariehamn to Constanta | 1,158.74 mi (1,864.81 km) |
| Mariehamn to Corabia | 1,144.05 mi (1,841.17 km) |
| Mariehamn to Costesti | 1,085.60 mi (1,747.11 km) |
| Mariehamn to Covasna | 1,017.31 mi (1,637.21 km) |
| Mariehamn to Craiova | 1,101.24 mi (1,772.27 km) |
| Mariehamn to Cristuru Secuiesc | 976.44 mi (1,571.43 km) |
| Mariehamn to Cugir | 994.97 mi (1,601.26 km) |
| Mariehamn to Cumpana | 1,161.33 mi (1,868.99 km) |
| Mariehamn to Curtea de Arges | 1,052.02 mi (1,693.06 km) |
