| Therwil to Smolyan | 935.57 mi (1,505.65 km) |
| Therwil to Sofia | 836.06 mi (1,345.51 km) |
| Therwil to Sopot | 901.24 mi (1,450.41 km) |
| Therwil to Sozopol | 1,042.28 mi (1,677.39 km) |
| Therwil to Sredets | 1,021.60 mi (1,644.10 km) |
| Therwil to Stamboliyski | 908.75 mi (1,462.49 km) |
| Therwil to Stara Zagora | 948.76 mi (1,526.88 km) |
| Therwil to Svilengrad | 995.66 mi (1,602.36 km) |
| Therwil to Svishtov | 899.61 mi (1,447.79 km) |
| Therwil to Targovishte | 966.45 mi (1,555.35 km) |
| Therwil to Teteven | 871.00 mi (1,401.75 km) |
| Therwil to Troyan | 892.35 mi (1,436.10 km) |
| Therwil to Tryavna | 928.32 mi (1,493.99 km) |
| Therwil to Tutrakan | 946.58 mi (1,523.37 km) |
| Therwil to Varna | 1,028.70 mi (1,655.53 km) |
