| Waltham Cross to Smolyan | 1,355.44 mi (2,181.36 km) |
| Waltham Cross to Sofia | 1,252.45 mi (2,015.62 km) |
| Waltham Cross to Sopot | 1,311.86 mi (2,111.24 km) |
| Waltham Cross to Sozopol | 1,442.28 mi (2,321.12 km) |
| Waltham Cross to Sredets | 1,424.38 mi (2,292.32 km) |
| Waltham Cross to Stamboliyski | 1,324.91 mi (2,132.24 km) |
| Waltham Cross to Stara Zagora | 1,357.47 mi (2,184.64 km) |
| Waltham Cross to Svilengrad | 1,407.89 mi (2,265.78 km) |
| Waltham Cross to Svishtov | 1,297.49 mi (2,088.10 km) |
| Waltham Cross to Targovishte | 1,362.84 mi (2,193.27 km) |
| Waltham Cross to Teteven | 1,281.20 mi (2,061.89 km) |
| Waltham Cross to Troyan | 1,300.87 mi (2,093.55 km) |
| Waltham Cross to Tryavna | 1,333.52 mi (2,146.10 km) |
| Waltham Cross to Tutrakan | 1,333.58 mi (2,146.19 km) |
| Waltham Cross to Varna | 1,419.55 mi (2,284.54 km) |
