| Boissy-Saint-Leger to Smolyan | 1,183.30 mi (1,904.34 km) |
| Boissy-Saint-Leger to Sofia | 1,083.36 mi (1,743.50 km) |
| Boissy-Saint-Leger to Sopot | 1,147.82 mi (1,847.25 km) |
| Boissy-Saint-Leger to Sozopol | 1,287.17 mi (2,071.49 km) |
| Boissy-Saint-Leger to Sredets | 1,267.00 mi (2,039.04 km) |
| Boissy-Saint-Leger to Stamboliyski | 1,156.11 mi (1,860.58 km) |
| Boissy-Saint-Leger to Stara Zagora | 1,195.11 mi (1,923.34 km) |
| Boissy-Saint-Leger to Svilengrad | 1,242.62 mi (1,999.81 km) |
| Boissy-Saint-Leger to Svishtov | 1,143.65 mi (1,840.53 km) |
| Boissy-Saint-Leger to Targovishte | 1,210.34 mi (1,947.86 km) |
| Boissy-Saint-Leger to Teteven | 1,117.46 mi (1,798.38 km) |
| Boissy-Saint-Leger to Troyan | 1,138.56 mi (1,832.34 km) |
| Boissy-Saint-Leger to Tryavna | 1,174.00 mi (1,889.37 km) |
| Boissy-Saint-Leger to Tutrakan | 1,188.03 mi (1,911.95 km) |
| Boissy-Saint-Leger to Varna | 1,271.44 mi (2,046.18 km) |
