| Bouguenais to Smolyan | 1,348.72 mi (2,170.55 km) |
| Bouguenais to Sofia | 1,253.03 mi (2,016.56 km) |
| Bouguenais to Sopot | 1,320.85 mi (2,125.71 km) |
| Bouguenais to Sozopol | 1,465.47 mi (2,358.45 km) |
| Bouguenais to Sredets | 1,443.82 mi (2,323.61 km) |
| Bouguenais to Stamboliyski | 1,324.94 mi (2,132.29 km) |
| Bouguenais to Stara Zagora | 1,368.88 mi (2,202.99 km) |
| Bouguenais to Svilengrad | 1,413.38 mi (2,274.62 km) |
| Bouguenais to Svishtov | 1,324.56 mi (2,131.68 km) |
| Bouguenais to Targovishte | 1,391.40 mi (2,239.24 km) |
| Bouguenais to Teteven | 1,291.16 mi (2,077.93 km) |
| Bouguenais to Troyan | 1,313.13 mi (2,113.28 km) |
| Bouguenais to Tryavna | 1,350.29 mi (2,173.08 km) |
| Bouguenais to Tutrakan | 1,374.02 mi (2,211.27 km) |
| Bouguenais to Varna | 1,454.85 mi (2,341.35 km) |
