| Smolyan to Cologno al Serio | 798.50 mi (1,285.07 km) |
| Smolyan to Cologno Monzese | 817.32 mi (1,315.34 km) |
| Smolyan to Colorno | 755.47 mi (1,215.81 km) |
| Smolyan to Comacchio | 665.94 mi (1,071.72 km) |
| Smolyan to Comiso | 627.38 mi (1,009.66 km) |
| Smolyan to Como | 831.17 mi (1,337.64 km) |
| Smolyan to Concordia Sagittaria | 658.06 mi (1,059.05 km) |
| Smolyan to Concorezzo | 815.65 mi (1,312.66 km) |
| Smolyan to Conegliano | 685.86 mi (1,103.78 km) |
| Smolyan to Conselice | 679.67 mi (1,093.83 km) |
| Smolyan to Conselve | 690.80 mi (1,111.74 km) |
| Smolyan to Conversano | 395.95 mi (637.21 km) |
| Smolyan to Copertino | 358.78 mi (577.40 km) |
| Smolyan to Copparo | 686.05 mi (1,104.09 km) |
| Smolyan to Corato | 431.26 mi (694.05 km) |
