| Walthamstow to Smolyan | 1,352.41 mi (2,176.50 km) |
| Walthamstow to Sofia | 1,249.51 mi (2,010.89 km) |
| Walthamstow to Sopot | 1,309.13 mi (2,106.85 km) |
| Walthamstow to Sozopol | 1,439.92 mi (2,317.33 km) |
| Walthamstow to Sredets | 1,421.94 mi (2,288.39 km) |
| Walthamstow to Stamboliyski | 1,322.01 mi (2,127.57 km) |
| Walthamstow to Stara Zagora | 1,354.82 mi (2,180.37 km) |
| Walthamstow to Svilengrad | 1,405.14 mi (2,261.36 km) |
| Walthamstow to Svishtov | 1,295.13 mi (2,084.31 km) |
| Walthamstow to Targovishte | 1,360.55 mi (2,189.60 km) |
| Walthamstow to Teteven | 1,278.47 mi (2,057.50 km) |
| Walthamstow to Troyan | 1,298.20 mi (2,089.25 km) |
| Walthamstow to Tryavna | 1,330.97 mi (2,141.99 km) |
| Walthamstow to Tutrakan | 1,331.53 mi (2,142.89 km) |
| Walthamstow to Varna | 1,417.44 mi (2,281.15 km) |
