| Guildford to Smolyan | 1,366.37 mi (2,198.96 km) |
| Guildford to Sofia | 1,263.90 mi (2,034.05 km) |
| Guildford to Sopot | 1,324.48 mi (2,131.55 km) |
| Guildford to Sozopol | 1,456.89 mi (2,344.64 km) |
| Guildford to Sredets | 1,438.53 mi (2,315.08 km) |
| Guildford to Stamboliyski | 1,336.54 mi (2,150.95 km) |
| Guildford to Stara Zagora | 1,370.51 mi (2,205.62 km) |
| Guildford to Svilengrad | 1,420.39 mi (2,285.89 km) |
| Guildford to Svishtov | 1,312.14 mi (2,111.68 km) |
| Guildford to Targovishte | 1,377.85 mi (2,217.43 km) |
| Guildford to Teteven | 1,293.84 mi (2,082.23 km) |
| Guildford to Troyan | 1,313.83 mi (2,114.41 km) |
| Guildford to Tryavna | 1,347.11 mi (2,167.96 km) |
| Guildford to Tutrakan | 1,349.85 mi (2,172.38 km) |
| Guildford to Varna | 1,435.47 mi (2,310.17 km) |
