| Sliven to Cologno al Serio | 847.13 mi (1,363.33 km) |
| Sliven to Cologno Monzese | 866.88 mi (1,395.11 km) |
| Sliven to Colorno | 808.95 mi (1,301.88 km) |
| Sliven to Comacchio | 719.55 mi (1,158.00 km) |
| Sliven to Comiso | 736.96 mi (1,186.02 km) |
| Sliven to Como | 878.63 mi (1,414.02 km) |
| Sliven to Concordia Sagittaria | 699.75 mi (1,126.14 km) |
| Sliven to Concorezzo | 864.64 mi (1,391.51 km) |
| Sliven to Conegliano | 727.54 mi (1,170.86 km) |
| Sliven to Conselice | 735.47 mi (1,183.62 km) |
| Sliven to Conselve | 739.66 mi (1,190.37 km) |
| Sliven to Conversano | 488.86 mi (786.74 km) |
| Sliven to Copertino | 459.92 mi (740.17 km) |
| Sliven to Copparo | 738.17 mi (1,187.96 km) |
| Sliven to Corato | 521.25 mi (838.87 km) |
