| Trowbridge to Smolyan | 1,435.37 mi (2,310.01 km) |
| Trowbridge to Sofia | 1,333.15 mi (2,145.50 km) |
| Trowbridge to Sopot | 1,394.17 mi (2,243.70 km) |
| Trowbridge to Sozopol | 1,527.20 mi (2,457.78 km) |
| Trowbridge to Sredets | 1,508.70 mi (2,428.01 km) |
| Trowbridge to Stamboliyski | 1,405.84 mi (2,262.48 km) |
| Trowbridge to Stara Zagora | 1,440.34 mi (2,318.00 km) |
| Trowbridge to Svilengrad | 1,490.01 mi (2,397.94 km) |
| Trowbridge to Svishtov | 1,382.47 mi (2,224.87 km) |
| Trowbridge to Targovishte | 1,448.26 mi (2,330.76 km) |
| Trowbridge to Teteven | 1,363.54 mi (2,194.40 km) |
| Trowbridge to Troyan | 1,383.65 mi (2,226.76 km) |
| Trowbridge to Tryavna | 1,417.12 mi (2,280.63 km) |
| Trowbridge to Tutrakan | 1,420.55 mi (2,286.15 km) |
| Trowbridge to Varna | 1,506.09 mi (2,423.82 km) |
