| Somma Lombardo to Smolyan | 847.02 mi (1,363.15 km) |
| Somma Lombardo to Sofia | 752.30 mi (1,210.70 km) |
| Somma Lombardo to Sopot | 821.04 mi (1,321.34 km) |
| Somma Lombardo to Sozopol | 967.64 mi (1,557.26 km) |
| Somma Lombardo to Sredets | 945.28 mi (1,521.27 km) |
| Somma Lombardo to Stamboliyski | 823.83 mi (1,325.82 km) |
| Somma Lombardo to Stara Zagora | 869.20 mi (1,398.84 km) |
| Somma Lombardo to Svilengrad | 912.58 mi (1,468.65 km) |
| Somma Lombardo to Svishtov | 829.20 mi (1,334.46 km) |
| Somma Lombardo to Targovishte | 895.71 mi (1,441.50 km) |
| Somma Lombardo to Teteven | 791.74 mi (1,274.18 km) |
| Somma Lombardo to Troyan | 814.00 mi (1,310.01 km) |
| Somma Lombardo to Tryavna | 851.85 mi (1,370.92 km) |
| Somma Lombardo to Tutrakan | 882.72 mi (1,420.60 km) |
| Somma Lombardo to Varna | 960.59 mi (1,545.92 km) |
