| Smolyan to Castelli Calepio | 790.08 mi (1,271.51 km) |
| Smolyan to Castelnovo ne' Monti | 747.75 mi (1,203.39 km) |
| Smolyan to Castelnuovo Berardenga | 682.76 mi (1,098.80 km) |
| Smolyan to Castelnuovo di Porto | 628.43 mi (1,011.36 km) |
| Smolyan to Castelnuovo di Verona | 745.96 mi (1,200.50 km) |
| Smolyan to Castelnuovo Rangone | 723.48 mi (1,164.33 km) |
| Smolyan to Castelvetrano | 687.73 mi (1,106.80 km) |
| Smolyan to Castelvetro di Modena | 721.98 mi (1,161.92 km) |
| Smolyan to Castenaso | 697.01 mi (1,121.73 km) |
| Smolyan to Castenedolo | 768.59 mi (1,236.92 km) |
| Smolyan to Castiglion Fiorentino | 662.02 mi (1,065.43 km) |
| Smolyan to Castiglione del Lago | 654.17 mi (1,052.78 km) |
| Smolyan to Castiglione delle Stiviere | 757.79 mi (1,219.55 km) |
| Smolyan to Castrolibero | 473.31 mi (761.72 km) |
| Smolyan to Castrovillari | 461.45 mi (742.64 km) |
