| Seaford to Smolyan | 1,328.27 mi (2,137.64 km) |
| Seaford to Sofia | 1,226.14 mi (1,973.27 km) |
| Seaford to Sopot | 1,287.40 mi (2,071.87 km) |
| Seaford to Sozopol | 1,421.07 mi (2,286.99 km) |
| Seaford to Sredets | 1,402.39 mi (2,256.92 km) |
| Seaford to Stamboliyski | 1,298.85 mi (2,090.29 km) |
| Seaford to Stara Zagora | 1,333.67 mi (2,146.34 km) |
| Seaford to Svilengrad | 1,383.19 mi (2,226.03 km) |
| Seaford to Svishtov | 1,276.40 mi (2,054.17 km) |
| Seaford to Targovishte | 1,342.34 mi (2,160.28 km) |
| Seaford to Teteven | 1,256.78 mi (2,022.59 km) |
| Seaford to Troyan | 1,276.97 mi (2,055.09 km) |
| Seaford to Tryavna | 1,310.63 mi (2,109.26 km) |
| Seaford to Tutrakan | 1,315.27 mi (2,116.72 km) |
| Seaford to Varna | 1,400.60 mi (2,254.04 km) |
