| Abertillery to Smolyan | 1,481.64 mi (2,384.47 km) |
| Abertillery to Sofia | 1,379.19 mi (2,219.59 km) |
| Abertillery to Sopot | 1,439.73 mi (2,317.03 km) |
| Abertillery to Sozopol | 1,571.84 mi (2,529.63 km) |
| Abertillery to Sredets | 1,553.57 mi (2,500.23 km) |
| Abertillery to Stamboliyski | 1,451.83 mi (2,336.49 km) |
| Abertillery to Stara Zagora | 1,485.72 mi (2,391.04 km) |
| Abertillery to Svilengrad | 1,535.65 mi (2,471.39 km) |
| Abertillery to Svishtov | 1,427.06 mi (2,296.64 km) |
| Abertillery to Targovishte | 1,492.69 mi (2,402.25 km) |
| Abertillery to Teteven | 1,409.08 mi (2,267.70 km) |
| Abertillery to Troyan | 1,429.05 mi (2,299.84 km) |
| Abertillery to Tryavna | 1,462.25 mi (2,353.26 km) |
| Abertillery to Tutrakan | 1,464.27 mi (2,356.52 km) |
| Abertillery to Varna | 1,550.03 mi (2,494.53 km) |
