| Rhyl to Smolyan | 1,531.16 mi (2,464.16 km) |
| Rhyl to Sofia | 1,427.59 mi (2,297.48 km) |
| Rhyl to Sopot | 1,485.16 mi (2,390.13 km) |
| Rhyl to Sozopol | 1,611.92 mi (2,594.13 km) |
| Rhyl to Sredets | 1,594.92 mi (2,566.78 km) |
| Rhyl to Stamboliyski | 1,499.70 mi (2,413.53 km) |
| Rhyl to Stara Zagora | 1,530.03 mi (2,462.34 km) |
| Rhyl to Svilengrad | 1,581.23 mi (2,544.75 km) |
| Rhyl to Svishtov | 1,467.33 mi (2,361.44 km) |
| Rhyl to Targovishte | 1,531.87 mi (2,465.30 km) |
| Rhyl to Teteven | 1,454.53 mi (2,340.83 km) |
| Rhyl to Troyan | 1,473.64 mi (2,371.59 km) |
| Rhyl to Tryavna | 1,505.20 mi (2,422.39 km) |
| Rhyl to Tutrakan | 1,500.14 mi (2,414.24 km) |
| Rhyl to Varna | 1,586.65 mi (2,553.46 km) |
