| Witham to Smolyan | 1,331.69 mi (2,143.15 km) |
| Witham to Sofia | 1,228.48 mi (1,977.05 km) |
| Witham to Sopot | 1,287.33 mi (2,071.75 km) |
| Witham to Sozopol | 1,416.82 mi (2,280.15 km) |
| Witham to Sredets | 1,399.14 mi (2,251.69 km) |
| Witham to Stamboliyski | 1,300.84 mi (2,093.51 km) |
| Witham to Stara Zagora | 1,332.73 mi (2,144.83 km) |
| Witham to Svilengrad | 1,383.39 mi (2,226.34 km) |
| Witham to Svishtov | 1,272.04 mi (2,047.16 km) |
| Witham to Targovishte | 1,337.22 mi (2,152.05 km) |
| Witham to Teteven | 1,256.67 mi (2,022.41 km) |
| Witham to Troyan | 1,276.18 mi (2,053.81 km) |
| Witham to Tryavna | 1,308.54 mi (2,105.90 km) |
| Witham to Tutrakan | 1,307.45 mi (2,104.13 km) |
| Witham to Varna | 1,393.54 mi (2,242.69 km) |
