| Colwyn Bay to Smolyan | 1,538.93 mi (2,476.67 km) |
| Colwyn Bay to Sofia | 1,435.40 mi (2,310.06 km) |
| Colwyn Bay to Sopot | 1,493.13 mi (2,402.95 km) |
| Colwyn Bay to Sozopol | 1,620.14 mi (2,607.36 km) |
| Colwyn Bay to Sredets | 1,603.09 mi (2,579.92 km) |
| Colwyn Bay to Stamboliyski | 1,507.55 mi (2,426.17 km) |
| Colwyn Bay to Stara Zagora | 1,538.05 mi (2,475.25 km) |
| Colwyn Bay to Svilengrad | 1,589.20 mi (2,557.57 km) |
| Colwyn Bay to Svishtov | 1,475.53 mi (2,374.63 km) |
| Colwyn Bay to Targovishte | 1,540.12 mi (2,478.58 km) |
| Colwyn Bay to Teteven | 1,462.49 mi (2,353.65 km) |
| Colwyn Bay to Troyan | 1,481.64 mi (2,384.47 km) |
| Colwyn Bay to Tryavna | 1,513.29 mi (2,435.40 km) |
| Colwyn Bay to Tutrakan | 1,508.52 mi (2,427.73 km) |
| Colwyn Bay to Varna | 1,595.00 mi (2,566.91 km) |
