| Somain to Smolyan | 1,187.63 mi (1,911.31 km) |
| Somain to Sofia | 1,085.13 mi (1,746.35 km) |
| Somain to Sopot | 1,145.81 mi (1,844.00 km) |
| Somain to Sozopol | 1,278.82 mi (2,058.06 km) |
| Somain to Sredets | 1,260.25 mi (2,028.18 km) |
| Somain to Stamboliyski | 1,157.77 mi (1,863.25 km) |
| Somain to Stara Zagora | 1,191.91 mi (1,918.19 km) |
| Somain to Svilengrad | 1,241.68 mi (1,998.30 km) |
| Somain to Svishtov | 1,134.12 mi (1,825.19 km) |
| Somain to Targovishte | 1,200.00 mi (1,931.21 km) |
| Somain to Teteven | 1,115.16 mi (1,794.68 km) |
| Somain to Troyan | 1,135.22 mi (1,826.96 km) |
| Somain to Tryavna | 1,168.65 mi (1,880.77 km) |
| Somain to Tutrakan | 1,172.82 mi (1,887.47 km) |
| Somain to Varna | 1,258.16 mi (2,024.81 km) |
