| Llantwit Major to Smolyan | 1,489.44 mi (2,397.02 km) |
| Llantwit Major to Sofia | 1,387.36 mi (2,232.74 km) |
| Llantwit Major to Sopot | 1,448.62 mi (2,331.33 km) |
| Llantwit Major to Sozopol | 1,581.96 mi (2,545.91 km) |
| Llantwit Major to Sredets | 1,563.39 mi (2,516.04 km) |
| Llantwit Major to Stamboliyski | 1,460.08 mi (2,349.77 km) |
| Llantwit Major to Stara Zagora | 1,494.86 mi (2,405.74 km) |
| Llantwit Major to Svilengrad | 1,544.42 mi (2,485.51 km) |
| Llantwit Major to Svishtov | 1,437.24 mi (2,313.02 km) |
| Llantwit Major to Targovishte | 1,503.08 mi (2,418.97 km) |
| Llantwit Major to Teteven | 1,417.99 mi (2,282.04 km) |
| Llantwit Major to Troyan | 1,438.16 mi (2,314.50 km) |
| Llantwit Major to Tryavna | 1,471.74 mi (2,368.53 km) |
| Llantwit Major to Tutrakan | 1,475.47 mi (2,374.54 km) |
| Llantwit Major to Varna | 1,560.99 mi (2,512.17 km) |
