| Port Talbot to Smolyan | 1,506.34 mi (2,424.21 km) |
| Port Talbot to Sofia | 1,404.13 mi (2,259.73 km) |
| Port Talbot to Sopot | 1,465.15 mi (2,357.93 km) |
| Port Talbot to Sozopol | 1,598.02 mi (2,571.77 km) |
| Port Talbot to Sredets | 1,579.57 mi (2,542.08 km) |
| Port Talbot to Stamboliyski | 1,476.83 mi (2,376.72 km) |
| Port Talbot to Stara Zagora | 1,511.30 mi (2,432.19 km) |
| Port Talbot to Svilengrad | 1,560.99 mi (2,512.17 km) |
| Port Talbot to Svishtov | 1,453.28 mi (2,338.83 km) |
| Port Talbot to Targovishte | 1,519.03 mi (2,444.65 km) |
| Port Talbot to Teteven | 1,434.51 mi (2,308.62 km) |
| Port Talbot to Troyan | 1,454.61 mi (2,340.96 km) |
| Port Talbot to Tryavna | 1,488.04 mi (2,394.77 km) |
| Port Talbot to Tutrakan | 1,491.09 mi (2,399.68 km) |
| Port Talbot to Varna | 1,576.71 mi (2,537.47 km) |
