| Trier to Smolyan | 1,034.67 mi (1,665.15 km) |
| Trier to Sofia | 931.79 mi (1,499.57 km) |
| Trier to Sopot | 991.77 mi (1,596.10 km) |
| Trier to Sozopol | 1,124.15 mi (1,809.14 km) |
| Trier to Sredets | 1,105.67 mi (1,779.41 km) |
| Trier to Stamboliyski | 1,004.32 mi (1,616.29 km) |
| Trier to Stara Zagora | 1,037.69 mi (1,670.00 km) |
| Trier to Svilengrad | 1,087.72 mi (1,750.52 km) |
| Trier to Svishtov | 979.42 mi (1,576.23 km) |
| Trier to Targovishte | 1,045.27 mi (1,682.19 km) |
| Trier to Teteven | 961.11 mi (1,546.76 km) |
| Trier to Troyan | 981.02 mi (1,578.80 km) |
| Trier to Tryavna | 1,014.22 mi (1,632.23 km) |
| Trier to Tutrakan | 1,018.13 mi (1,638.52 km) |
| Trier to Varna | 1,103.42 mi (1,775.78 km) |
