| Sliven to Castelli Calepio | 838.04 mi (1,348.69 km) |
| Sliven to Castelnovo ne' Monti | 805.57 mi (1,296.44 km) |
| Sliven to Castelnuovo Berardenga | 749.56 mi (1,206.29 km) |
| Sliven to Castelnuovo di Porto | 705.95 mi (1,136.11 km) |
| Sliven to Castelnuovo di Verona | 794.54 mi (1,278.69 km) |
| Sliven to Castelnuovo Rangone | 779.84 mi (1,255.03 km) |
| Sliven to Castelvetrano | 792.58 mi (1,275.53 km) |
| Sliven to Castelvetro di Modena | 778.78 mi (1,253.32 km) |
| Sliven to Castenaso | 753.24 mi (1,212.22 km) |
| Sliven to Castenedolo | 817.46 mi (1,315.57 km) |
| Sliven to Castiglion Fiorentino | 728.74 mi (1,172.80 km) |
| Sliven to Castiglione del Lago | 722.72 mi (1,163.11 km) |
| Sliven to Castiglione delle Stiviere | 807.03 mi (1,298.78 km) |
| Sliven to Castrolibero | 576.84 mi (928.33 km) |
| Sliven to Castrovillari | 561.97 mi (904.41 km) |
