| Saint-Sebastien-sur-Loire to Smolyan | 1,343.39 mi (2,161.97 km) |
| Saint-Sebastien-sur-Loire to Sofia | 1,247.62 mi (2,007.84 km) |
| Saint-Sebastien-sur-Loire to Sopot | 1,315.38 mi (2,116.91 km) |
| Saint-Sebastien-sur-Loire to Sozopol | 1,459.92 mi (2,349.52 km) |
| Saint-Sebastien-sur-Loire to Sredets | 1,438.30 mi (2,314.72 km) |
| Saint-Sebastien-sur-Loire to Stamboliyski | 1,319.55 mi (2,123.61 km) |
| Saint-Sebastien-sur-Loire to Stara Zagora | 1,363.40 mi (2,194.18 km) |
| Saint-Sebastien-sur-Loire to Svilengrad | 1,407.96 mi (2,265.89 km) |
| Saint-Sebastien-sur-Loire to Svishtov | 1,318.96 mi (2,122.66 km) |
| Saint-Sebastien-sur-Loire to Targovishte | 1,385.80 mi (2,230.23 km) |
| Saint-Sebastien-sur-Loire to Teteven | 1,285.68 mi (2,069.10 km) |
| Saint-Sebastien-sur-Loire to Troyan | 1,307.63 mi (2,104.43 km) |
| Saint-Sebastien-sur-Loire to Tryavna | 1,344.77 mi (2,164.20 km) |
| Saint-Sebastien-sur-Loire to Tutrakan | 1,368.34 mi (2,202.13 km) |
| Saint-Sebastien-sur-Loire to Varna | 1,449.22 mi (2,332.29 km) |
