| Huelva to Smolyan | 1,705.86 mi (2,745.32 km) |
| Huelva to Sofia | 1,637.44 mi (2,635.21 km) |
| Huelva to Sopot | 1,709.36 mi (2,750.95 km) |
| Huelva to Sozopol | 1,859.37 mi (2,992.37 km) |
| Huelva to Sredets | 1,833.90 mi (2,951.37 km) |
| Huelva to Stamboliyski | 1,697.44 mi (2,731.77 km) |
| Huelva to Stara Zagora | 1,754.82 mi (2,824.11 km) |
| Huelva to Svilengrad | 1,783.11 mi (2,869.64 km) |
| Huelva to Svishtov | 1,742.71 mi (2,804.62 km) |
| Huelva to Targovishte | 1,803.36 mi (2,902.22 km) |
| Huelva to Teteven | 1,685.62 mi (2,712.75 km) |
| Huelva to Troyan | 1,708.27 mi (2,749.20 km) |
| Huelva to Tryavna | 1,747.87 mi (2,812.92 km) |
| Huelva to Tutrakan | 1,807.52 mi (2,908.93 km) |
| Huelva to Varna | 1,870.41 mi (3,010.13 km) |
