| Porthcawl to Smolyan | 1,499.74 mi (2,413.61 km) |
| Porthcawl to Sofia | 1,397.63 mi (2,249.27 km) |
| Porthcawl to Sopot | 1,458.82 mi (2,347.74 km) |
| Porthcawl to Sozopol | 1,592.00 mi (2,562.08 km) |
| Porthcawl to Sredets | 1,573.48 mi (2,532.27 km) |
| Porthcawl to Stamboliyski | 1,470.34 mi (2,366.28 km) |
| Porthcawl to Stara Zagora | 1,505.03 mi (2,422.10 km) |
| Porthcawl to Svilengrad | 1,554.63 mi (2,501.94 km) |
| Porthcawl to Svishtov | 1,447.28 mi (2,329.17 km) |
| Porthcawl to Targovishte | 1,513.09 mi (2,435.08 km) |
| Porthcawl to Teteven | 1,428.18 mi (2,298.44 km) |
| Porthcawl to Troyan | 1,448.33 mi (2,330.86 km) |
| Porthcawl to Tryavna | 1,481.86 mi (2,384.83 km) |
| Porthcawl to Tutrakan | 1,485.37 mi (2,390.47 km) |
| Porthcawl to Varna | 1,570.92 mi (2,528.16 km) |
