| Holborn to Smolyan | 1,354.57 mi (2,179.97 km) |
| Holborn to Sofia | 1,251.74 mi (2,014.48 km) |
| Holborn to Sopot | 1,311.54 mi (2,110.72 km) |
| Holborn to Sozopol | 1,442.63 mi (2,321.69 km) |
| Holborn to Sredets | 1,424.57 mi (2,292.63 km) |
| Holborn to Stamboliyski | 1,324.27 mi (2,131.20 km) |
| Holborn to Stara Zagora | 1,357.29 mi (2,184.35 km) |
| Holborn to Svilengrad | 1,407.53 mi (2,265.21 km) |
| Holborn to Svishtov | 1,297.84 mi (2,088.66 km) |
| Holborn to Targovishte | 1,363.31 mi (2,194.04 km) |
| Holborn to Teteven | 1,280.88 mi (2,061.38 km) |
| Holborn to Troyan | 1,300.66 mi (2,093.21 km) |
| Holborn to Tryavna | 1,333.52 mi (2,146.09 km) |
| Holborn to Tutrakan | 1,334.48 mi (2,147.64 km) |
| Holborn to Varna | 1,420.34 mi (2,285.81 km) |
