| Langenthal to Smolyan | 918.82 mi (1,478.69 km) |
| Langenthal to Sofia | 819.87 mi (1,319.45 km) |
| Langenthal to Sopot | 885.61 mi (1,425.26 km) |
| Langenthal to Sozopol | 1,027.57 mi (1,653.71 km) |
| Langenthal to Sredets | 1,006.62 mi (1,620.01 km) |
| Langenthal to Stamboliyski | 892.47 mi (1,436.30 km) |
| Langenthal to Stara Zagora | 933.26 mi (1,501.94 km) |
| Langenthal to Svilengrad | 979.71 mi (1,576.69 km) |
| Langenthal to Svishtov | 885.36 mi (1,424.86 km) |
| Langenthal to Targovishte | 952.23 mi (1,532.46 km) |
| Langenthal to Teteven | 855.47 mi (1,376.75 km) |
| Langenthal to Troyan | 876.97 mi (1,411.35 km) |
| Langenthal to Tryavna | 913.24 mi (1,469.72 km) |
| Langenthal to Tutrakan | 933.33 mi (1,502.05 km) |
| Langenthal to Varna | 1,014.91 mi (1,633.34 km) |
