| Aberystwyth to Smolyan | 1,534.34 mi (2,469.28 km) |
| Aberystwyth to Sofia | 1,431.46 mi (2,303.71 km) |
| Aberystwyth to Sopot | 1,491.02 mi (2,399.57 km) |
| Aberystwyth to Sozopol | 1,621.30 mi (2,609.23 km) |
| Aberystwyth to Sredets | 1,603.48 mi (2,580.56 km) |
| Aberystwyth to Stamboliyski | 1,503.96 mi (2,420.39 km) |
| Aberystwyth to Stara Zagora | 1,536.65 mi (2,472.99 km) |
| Aberystwyth to Svilengrad | 1,587.04 mi (2,554.10 km) |
| Aberystwyth to Svishtov | 1,476.51 mi (2,376.21 km) |
| Aberystwyth to Targovishte | 1,541.78 mi (2,481.25 km) |
| Aberystwyth to Teteven | 1,460.36 mi (2,350.22 km) |
| Aberystwyth to Troyan | 1,480.04 mi (2,381.90 km) |
| Aberystwyth to Tryavna | 1,512.68 mi (2,434.43 km) |
| Aberystwyth to Tutrakan | 1,512.11 mi (2,433.51 km) |
| Aberystwyth to Varna | 1,598.20 mi (2,572.06 km) |
