| Smolyan to Cassino | 561.62 mi (903.85 km) |
| Smolyan to Castagneto Carducci | 727.07 mi (1,170.11 km) |
| Smolyan to Castano Primo | 841.72 mi (1,354.62 km) |
| Smolyan to Castel Bolognese | 678.34 mi (1,091.69 km) |
| Smolyan to Castel Gandolfo | 621.47 mi (1,000.15 km) |
| Smolyan to Castel Goffredo | 757.14 mi (1,218.49 km) |
| Smolyan to Castel Maggiore | 702.85 mi (1,131.13 km) |
| Smolyan to Castel Mella | 775.98 mi (1,248.82 km) |
| Smolyan to Castel San Giorgio | 522.63 mi (841.09 km) |
| Smolyan to Castel San Giovanni | 802.54 mi (1,291.56 km) |
| Smolyan to Castel San Pietro Terme | 690.00 mi (1,110.44 km) |
| Smolyan to Castel Volturno | 560.43 mi (901.93 km) |
| Smolyan to Castelbuono | 616.36 mi (991.93 km) |
| Smolyan to Casteldaccia | 640.31 mi (1,030.48 km) |
| Smolyan to Castelfidardo | 582.16 mi (936.90 km) |
