| Conwy to Smolyan | 1,543.73 mi (2,484.40 km) |
| Conwy to Sofia | 1,440.23 mi (2,317.83 km) |
| Conwy to Sopot | 1,498.03 mi (2,410.84 km) |
| Conwy to Sozopol | 1,625.15 mi (2,615.43 km) |
| Conwy to Sredets | 1,608.08 mi (2,587.95 km) |
| Conwy to Stamboliyski | 1,512.39 mi (2,433.96 km) |
| Conwy to Stara Zagora | 1,542.98 mi (2,483.18 km) |
| Conwy to Svilengrad | 1,594.10 mi (2,565.46 km) |
| Conwy to Svishtov | 1,480.53 mi (2,382.69 km) |
| Conwy to Targovishte | 1,545.15 mi (2,486.67 km) |
| Conwy to Teteven | 1,467.39 mi (2,361.53 km) |
| Conwy to Troyan | 1,486.56 mi (2,392.39 km) |
| Conwy to Tryavna | 1,518.24 mi (2,443.37 km) |
| Conwy to Tutrakan | 1,513.61 mi (2,435.92 km) |
| Conwy to Varna | 1,600.08 mi (2,575.09 km) |
