| Grande-Synthe to Smolyan | 1,244.58 mi (2,002.96 km) |
| Grande-Synthe to Sofia | 1,141.67 mi (1,837.35 km) |
| Grande-Synthe to Sopot | 1,201.38 mi (1,933.44 km) |
| Grande-Synthe to Sozopol | 1,332.60 mi (2,144.61 km) |
| Grande-Synthe to Sredets | 1,314.48 mi (2,115.45 km) |
| Grande-Synthe to Stamboliyski | 1,214.18 mi (1,954.03 km) |
| Grande-Synthe to Stara Zagora | 1,247.13 mi (2,007.06 km) |
| Grande-Synthe to Svilengrad | 1,297.38 mi (2,087.93 km) |
| Grande-Synthe to Svishtov | 1,187.81 mi (1,911.60 km) |
| Grande-Synthe to Targovishte | 1,253.35 mi (2,017.08 km) |
| Grande-Synthe to Teteven | 1,170.72 mi (1,884.09 km) |
| Grande-Synthe to Troyan | 1,190.50 mi (1,915.92 km) |
| Grande-Synthe to Tryavna | 1,223.38 mi (1,968.83 km) |
| Grande-Synthe to Tutrakan | 1,224.84 mi (1,971.19 km) |
| Grande-Synthe to Varna | 1,310.60 mi (2,109.20 km) |
