| Friendly to Smolyan | 5,022.15 mi (8,082.37 km) |
| Friendly to Sofia | 4,919.88 mi (7,917.79 km) |
| Friendly to Sopot | 4,980.10 mi (8,014.69 km) |
| Friendly to Sozopol | 5,109.12 mi (8,222.34 km) |
| Friendly to Sredets | 5,091.91 mi (8,194.63 km) |
| Friendly to Stamboliyski | 4,992.53 mi (8,034.70 km) |
| Friendly to Stara Zagora | 5,025.73 mi (8,088.12 km) |
| Friendly to Svilengrad | 5,076.10 mi (8,169.19 km) |
| Friendly to Svishtov | 4,964.48 mi (7,989.55 km) |
| Friendly to Targovishte | 5,029.12 mi (8,093.58 km) |
| Friendly to Teteven | 4,949.44 mi (7,965.35 km) |
| Friendly to Troyan | 4,969.13 mi (7,997.05 km) |
| Friendly to Tryavna | 5,001.58 mi (8,049.27 km) |
| Friendly to Tutrakan | 4,996.88 mi (8,041.70 km) |
| Friendly to Varna | 5,083.53 mi (8,181.15 km) |
