| Southampton to Smolyan | 1,393.49 mi (2,242.60 km) |
| Southampton to Sofia | 1,291.54 mi (2,078.54 km) |
| Southampton to Sopot | 1,353.10 mi (2,177.61 km) |
| Southampton to Sozopol | 1,487.13 mi (2,393.30 km) |
| Southampton to Sredets | 1,468.37 mi (2,363.12 km) |
| Southampton to Stamboliyski | 1,364.28 mi (2,195.60 km) |
| Southampton to Stara Zagora | 1,399.46 mi (2,252.21 km) |
| Southampton to Svilengrad | 1,448.84 mi (2,331.68 km) |
| Southampton to Svishtov | 1,342.48 mi (2,160.52 km) |
| Southampton to Targovishte | 1,408.46 mi (2,266.69 km) |
| Southampton to Teteven | 1,322.49 mi (2,128.34 km) |
| Southampton to Troyan | 1,342.75 mi (2,160.95 km) |
| Southampton to Tryavna | 1,376.53 mi (2,215.31 km) |
| Southampton to Tutrakan | 1,381.51 mi (2,223.33 km) |
| Southampton to Varna | 1,466.81 mi (2,360.60 km) |
