| Poperinge to Sofia | 1,120.48 mi (1,803.24 km) |
| Poperinge to Sopot | 1,180.32 mi (1,899.53 km) |
| Poperinge to Sozopol | 1,311.81 mi (2,111.16 km) |
| Poperinge to Sredets | 1,293.62 mi (2,081.88 km) |
| Poperinge to Stamboliyski | 1,193.00 mi (1,919.95 km) |
| Poperinge to Stara Zagora | 1,226.11 mi (1,973.24 km) |
| Poperinge to Svilengrad | 1,276.30 mi (2,054.00 km) |
| Poperinge to Svishtov | 1,167.03 mi (1,878.16 km) |
| Poperinge to Targovishte | 1,232.63 mi (1,983.73 km) |
| Poperinge to Teteven | 1,149.66 mi (1,850.19 km) |
| Poperinge to Troyan | 1,169.47 mi (1,882.08 km) |
| Poperinge to Tryavna | 1,202.44 mi (1,935.13 km) |
| Poperinge to Tutrakan | 1,204.36 mi (1,938.23 km) |
| Poperinge to Varna | 1,290.04 mi (2,076.12 km) |
| Poperinge to Veliki Preslav | 1,245.62 mi (2,004.64 km) |
