| Pencoed to Smolyan | 1,492.91 mi (2,402.60 km) |
| Pencoed to Sofia | 1,390.72 mi (2,238.14 km) |
| Pencoed to Sopot | 1,451.77 mi (2,336.40 km) |
| Pencoed to Sozopol | 1,584.74 mi (2,550.39 km) |
| Pencoed to Sredets | 1,566.26 mi (2,520.66 km) |
| Pencoed to Stamboliyski | 1,463.41 mi (2,355.14 km) |
| Pencoed to Stara Zagora | 1,497.93 mi (2,410.69 km) |
| Pencoed to Svilengrad | 1,547.61 mi (2,490.64 km) |
| Pencoed to Svishtov | 1,440.00 mi (2,317.46 km) |
| Pencoed to Targovishte | 1,505.77 mi (2,423.31 km) |
| Pencoed to Teteven | 1,421.13 mi (2,287.09 km) |
| Pencoed to Troyan | 1,441.24 mi (2,319.46 km) |
| Pencoed to Tryavna | 1,474.70 mi (2,373.31 km) |
| Pencoed to Tutrakan | 1,477.91 mi (2,378.47 km) |
| Pencoed to Varna | 1,563.51 mi (2,516.23 km) |
