| Harmanli to Cologno al Serio | 845.14 mi (1,360.11 km) |
| Harmanli to Cologno Monzese | 864.42 mi (1,391.15 km) |
| Harmanli to Colorno | 804.25 mi (1,294.31 km) |
| Harmanli to Comacchio | 714.57 mi (1,149.98 km) |
| Harmanli to Comiso | 693.49 mi (1,116.07 km) |
| Harmanli to Como | 877.32 mi (1,411.92 km) |
| Harmanli to Concordia Sagittaria | 701.07 mi (1,128.26 km) |
| Harmanli to Concorezzo | 862.48 mi (1,388.03 km) |
| Harmanli to Conegliano | 728.94 mi (1,173.11 km) |
| Harmanli to Conselice | 729.33 mi (1,173.74 km) |
| Harmanli to Conselve | 737.30 mi (1,186.57 km) |
| Harmanli to Conversano | 459.53 mi (739.55 km) |
| Harmanli to Copertino | 424.45 mi (683.09 km) |
| Harmanli to Copparo | 734.04 mi (1,181.33 km) |
| Harmanli to Corato | 494.00 mi (795.02 km) |
