| Sliven to Impruneta | 761.98 mi (1,226.29 km) |
| Sliven to Induno Olona | 891.07 mi (1,434.03 km) |
| Sliven to Inverigo | 871.66 mi (1,402.81 km) |
| Sliven to Inveruno | 887.37 mi (1,428.09 km) |
| Sliven to Inzago | 857.07 mi (1,379.33 km) |
| Sliven to Iseo | 830.95 mi (1,337.29 km) |
| Sliven to Isernia | 623.50 mi (1,003.42 km) |
| Sliven to Isola Capo Rizzuto | 546.84 mi (880.05 km) |
| Sliven to Isola del Liri | 656.37 mi (1,056.33 km) |
| Sliven to Isola della Scala | 781.22 mi (1,257.26 km) |
| Sliven to Isola Vicentina | 764.11 mi (1,229.72 km) |
| Sliven to Ispica | 730.57 mi (1,175.74 km) |
| Sliven to Istrana | 733.91 mi (1,181.12 km) |
| Sliven to Itri | 663.82 mi (1,068.32 km) |
| Sliven to Ittiri | 926.81 mi (1,491.56 km) |
