| Differdange to Smolyan | 1,058.17 mi (1,702.95 km) |
| Differdange to Sofia | 955.82 mi (1,538.25 km) |
| Differdange to Sopot | 1,016.95 mi (1,636.61 km) |
| Differdange to Sozopol | 1,151.11 mi (1,852.54 km) |
| Differdange to Sredets | 1,132.22 mi (1,822.13 km) |
| Differdange to Stamboliyski | 1,028.51 mi (1,655.22 km) |
| Differdange to Stara Zagora | 1,063.24 mi (1,711.12 km) |
| Differdange to Svilengrad | 1,112.74 mi (1,790.78 km) |
| Differdange to Svishtov | 1,006.54 mi (1,619.87 km) |
| Differdange to Targovishte | 1,072.66 mi (1,726.27 km) |
| Differdange to Teteven | 986.32 mi (1,587.33 km) |
| Differdange to Troyan | 1,006.54 mi (1,619.87 km) |
| Differdange to Tryavna | 1,040.31 mi (1,674.21 km) |
| Differdange to Tutrakan | 1,046.67 mi (1,684.46 km) |
| Differdange to Varna | 1,131.57 mi (1,821.09 km) |
