| Saint-Brieuc to Smolyan | 1,414.45 mi (2,276.33 km) |
| Saint-Brieuc to Sofia | 1,316.28 mi (2,118.34 km) |
| Saint-Brieuc to Sopot | 1,382.29 mi (2,224.58 km) |
| Saint-Brieuc to Sozopol | 1,523.86 mi (2,452.42 km) |
| Saint-Brieuc to Sredets | 1,503.13 mi (2,419.05 km) |
| Saint-Brieuc to Stamboliyski | 1,388.78 mi (2,235.02 km) |
| Saint-Brieuc to Stara Zagora | 1,429.95 mi (2,301.27 km) |
| Saint-Brieuc to Svilengrad | 1,476.27 mi (2,375.82 km) |
| Saint-Brieuc to Svishtov | 1,381.10 mi (2,222.66 km) |
| Saint-Brieuc to Targovishte | 1,447.92 mi (2,330.20 km) |
| Saint-Brieuc to Teteven | 1,352.16 mi (2,176.08 km) |
| Saint-Brieuc to Troyan | 1,373.64 mi (2,210.66 km) |
| Saint-Brieuc to Tryavna | 1,409.81 mi (2,268.86 km) |
| Saint-Brieuc to Tutrakan | 1,427.11 mi (2,296.71 km) |
| Saint-Brieuc to Varna | 1,509.83 mi (2,429.83 km) |
