| Northfleet to Smolyan | 1,334.35 mi (2,147.43 km) |
| Northfleet to Sofia | 1,231.50 mi (1,981.91 km) |
| Northfleet to Sopot | 1,291.26 mi (2,078.09 km) |
| Northfleet to Sozopol | 1,422.34 mi (2,289.03 km) |
| Northfleet to Sredets | 1,404.28 mi (2,259.97 km) |
| Northfleet to Stamboliyski | 1,304.02 mi (2,098.62 km) |
| Northfleet to Stara Zagora | 1,337.01 mi (2,151.70 km) |
| Northfleet to Svilengrad | 1,387.26 mi (2,232.58 km) |
| Northfleet to Svishtov | 1,277.54 mi (2,056.01 km) |
| Northfleet to Targovishte | 1,343.03 mi (2,161.39 km) |
| Northfleet to Teteven | 1,260.60 mi (2,028.74 km) |
| Northfleet to Troyan | 1,280.38 mi (2,060.57 km) |
| Northfleet to Tryavna | 1,313.23 mi (2,113.44 km) |
| Northfleet to Tutrakan | 1,314.22 mi (2,115.04 km) |
| Northfleet to Varna | 1,400.07 mi (2,253.20 km) |
