| Luxembourg to Smolyan | 1,050.92 mi (1,691.30 km) |
| Luxembourg to Sofia | 948.38 mi (1,526.27 km) |
| Luxembourg to Sopot | 1,009.11 mi (1,624.01 km) |
| Luxembourg to Sozopol | 1,142.67 mi (1,838.94 km) |
| Luxembourg to Sredets | 1,123.92 mi (1,808.77 km) |
| Luxembourg to Stamboliyski | 1,021.02 mi (1,643.17 km) |
| Luxembourg to Stara Zagora | 1,055.28 mi (1,698.31 km) |
| Luxembourg to Svilengrad | 1,104.97 mi (1,778.28 km) |
| Luxembourg to Svishtov | 998.03 mi (1,606.18 km) |
| Luxembourg to Targovishte | 1,064.06 mi (1,712.43 km) |
| Luxembourg to Teteven | 978.48 mi (1,574.70 km) |
| Luxembourg to Troyan | 998.59 mi (1,607.07 km) |
| Luxembourg to Tryavna | 1,032.16 mi (1,661.10 km) |
| Luxembourg to Tutrakan | 1,037.67 mi (1,669.96 km) |
| Luxembourg to Varna | 1,122.71 mi (1,806.82 km) |
