| Soissons to Smolyan | 1,161.69 mi (1,869.56 km) |
| Soissons to Sofia | 1,060.44 mi (1,706.62 km) |
| Soissons to Sopot | 1,123.29 mi (1,807.75 km) |
| Soissons to Sozopol | 1,259.99 mi (2,027.76 km) |
| Soissons to Sredets | 1,240.51 mi (1,996.40 km) |
| Soissons to Stamboliyski | 1,133.24 mi (1,823.78 km) |
| Soissons to Stara Zagora | 1,170.10 mi (1,883.10 km) |
| Soissons to Svilengrad | 1,218.68 mi (1,961.28 km) |
| Soissons to Svishtov | 1,115.79 mi (1,795.69 km) |
| Soissons to Targovishte | 1,182.21 mi (1,902.59 km) |
| Soissons to Teteven | 1,092.76 mi (1,758.62 km) |
| Soissons to Troyan | 1,113.42 mi (1,791.88 km) |
| Soissons to Tryavna | 1,148.01 mi (1,847.55 km) |
| Soissons to Tutrakan | 1,157.80 mi (1,863.29 km) |
| Soissons to Varna | 1,242.12 mi (1,998.99 km) |
