| Echternach to Smolyan | 1,045.15 mi (1,682.00 km) |
| Echternach to Sofia | 942.28 mi (1,516.45 km) |
| Echternach to Sopot | 1,002.28 mi (1,613.01 km) |
| Echternach to Sozopol | 1,134.65 mi (1,826.04 km) |
| Echternach to Sredets | 1,116.18 mi (1,796.32 km) |
| Echternach to Stamboliyski | 1,014.81 mi (1,633.18 km) |
| Echternach to Stara Zagora | 1,048.20 mi (1,686.91 km) |
| Echternach to Svilengrad | 1,098.23 mi (1,767.43 km) |
| Echternach to Svishtov | 989.92 mi (1,593.13 km) |
| Echternach to Targovishte | 1,055.76 mi (1,699.08 km) |
| Echternach to Teteven | 971.62 mi (1,563.68 km) |
| Echternach to Troyan | 991.53 mi (1,595.72 km) |
| Echternach to Tryavna | 1,024.73 mi (1,649.15 km) |
| Echternach to Tutrakan | 1,028.58 mi (1,655.34 km) |
| Echternach to Varna | 1,113.89 mi (1,792.63 km) |
