| Somain to Devnya | 1,243.17 mi (2,000.70 km) |
| Somain to Dimitrovgrad | 1,205.23 mi (1,939.63 km) |
| Somain to Dobrich | 1,242.04 mi (1,998.87 km) |
| Somain to Dospat | 1,163.11 mi (1,871.85 km) |
| Somain to Dupnitsa | 1,094.51 mi (1,761.45 km) |
| Somain to Elhovo | 1,240.83 mi (1,996.93 km) |
| Somain to Etropole | 1,107.39 mi (1,782.18 km) |
| Somain to Gabrovo | 1,161.67 mi (1,869.52 km) |
| Somain to Gorna Oryahovitsa | 1,166.90 mi (1,877.95 km) |
| Somain to Gotse Delchev | 1,149.18 mi (1,849.43 km) |
| Somain to Harmanli | 1,222.43 mi (1,967.30 km) |
| Somain to Haskovo | 1,208.61 mi (1,945.08 km) |
| Somain to Ihtiman | 1,115.82 mi (1,795.74 km) |
| Somain to Isperih | 1,193.79 mi (1,921.22 km) |
| Somain to Kardzhali | 1,212.10 mi (1,950.69 km) |
