| Bougival to Smolyan | 1,201.70 mi (1,933.94 km) |
| Bougival to Sofia | 1,101.67 mi (1,772.97 km) |
| Bougival to Sopot | 1,166.03 mi (1,876.55 km) |
| Bougival to Sozopol | 1,305.17 mi (2,100.46 km) |
| Bougival to Sredets | 1,285.06 mi (2,068.11 km) |
| Bougival to Stamboliyski | 1,174.43 mi (1,890.07 km) |
| Bougival to Stara Zagora | 1,213.29 mi (1,952.60 km) |
| Bougival to Svilengrad | 1,260.88 mi (2,029.19 km) |
| Bougival to Svishtov | 1,161.57 mi (1,869.37 km) |
| Bougival to Targovishte | 1,228.24 mi (1,976.67 km) |
| Bougival to Teteven | 1,135.66 mi (1,827.66 km) |
| Bougival to Troyan | 1,156.73 mi (1,861.57 km) |
| Bougival to Tryavna | 1,192.10 mi (1,918.49 km) |
| Bougival to Tutrakan | 1,205.70 mi (1,940.38 km) |
| Bougival to Varna | 1,289.21 mi (2,074.79 km) |
