| Waterford to Smolyan | 1,655.30 mi (2,663.95 km) |
| Waterford to Sofia | 1,552.97 mi (2,499.27 km) |
| Waterford to Sopot | 1,613.67 mi (2,596.95 km) |
| Waterford to Sozopol | 1,745.73 mi (2,809.49 km) |
| Waterford to Sredets | 1,727.51 mi (2,780.17 km) |
| Waterford to Stamboliyski | 1,625.64 mi (2,616.21 km) |
| Waterford to Stara Zagora | 1,659.68 mi (2,671.00 km) |
| Waterford to Svilengrad | 1,709.57 mi (2,751.29 km) |
| Waterford to Svishtov | 1,600.95 mi (2,576.48 km) |
| Waterford to Targovishte | 1,666.53 mi (2,682.01 km) |
| Waterford to Teteven | 1,583.02 mi (2,547.63 km) |
| Waterford to Troyan | 1,603.01 mi (2,579.79 km) |
| Waterford to Tryavna | 1,636.21 mi (2,633.23 km) |
| Waterford to Tutrakan | 1,637.82 mi (2,635.82 km) |
| Waterford to Varna | 1,723.67 mi (2,773.99 km) |
