| Cwmbran to Smolyan | 1,475.61 mi (2,374.76 km) |
| Cwmbran to Sofia | 1,373.21 mi (2,209.96 km) |
| Cwmbran to Sopot | 1,433.86 mi (2,307.58 km) |
| Cwmbran to Sozopol | 1,566.17 mi (2,520.51 km) |
| Cwmbran to Sredets | 1,547.86 mi (2,491.03 km) |
| Cwmbran to Stamboliyski | 1,445.86 mi (2,326.89 km) |
| Cwmbran to Stara Zagora | 1,479.89 mi (2,381.66 km) |
| Cwmbran to Svilengrad | 1,529.76 mi (2,461.91 km) |
| Cwmbran to Svishtov | 1,421.41 mi (2,287.53 km) |
| Cwmbran to Targovishte | 1,487.07 mi (2,393.20 km) |
| Cwmbran to Teteven | 1,403.22 mi (2,258.26 km) |
| Cwmbran to Troyan | 1,423.22 mi (2,290.45 km) |
| Cwmbran to Tryavna | 1,456.47 mi (2,343.97 km) |
| Cwmbran to Tutrakan | 1,458.80 mi (2,347.71 km) |
| Cwmbran to Varna | 1,544.51 mi (2,485.65 km) |
