| Houilles to Smolyan | 1,200.72 mi (1,932.37 km) |
| Houilles to Sofia | 1,100.57 mi (1,771.20 km) |
| Houilles to Sopot | 1,164.80 mi (1,874.56 km) |
| Houilles to Sozopol | 1,303.70 mi (2,098.11 km) |
| Houilles to Sredets | 1,283.66 mi (2,065.85 km) |
| Houilles to Stamboliyski | 1,173.34 mi (1,888.31 km) |
| Houilles to Stara Zagora | 1,212.01 mi (1,950.54 km) |
| Houilles to Svilengrad | 1,259.70 mi (2,027.29 km) |
| Houilles to Svishtov | 1,160.04 mi (1,866.90 km) |
| Houilles to Targovishte | 1,226.69 mi (1,974.17 km) |
| Houilles to Teteven | 1,134.40 mi (1,825.64 km) |
| Houilles to Troyan | 1,155.43 mi (1,859.49 km) |
| Houilles to Tryavna | 1,190.73 mi (1,916.30 km) |
| Houilles to Tutrakan | 1,203.96 mi (1,937.58 km) |
| Houilles to Varna | 1,287.56 mi (2,072.13 km) |
