| West Allis to Smolyan | 5,253.38 mi (8,454.51 km) |
| West Allis to Sofia | 5,149.16 mi (8,286.77 km) |
| West Allis to Sopot | 5,202.25 mi (8,372.21 km) |
| West Allis to Sozopol | 5,317.11 mi (8,557.06 km) |
| West Allis to Sredets | 5,303.20 mi (8,534.67 km) |
| West Allis to Stamboliyski | 5,220.13 mi (8,400.99 km) |
| West Allis to Stara Zagora | 5,244.82 mi (8,440.72 km) |
| West Allis to Svilengrad | 5,297.64 mi (8,525.73 km) |
| West Allis to Svishtov | 5,175.36 mi (8,328.94 km) |
| West Allis to Targovishte | 5,236.42 mi (8,427.20 km) |
| West Allis to Teteven | 5,171.94 mi (8,323.44 km) |
| West Allis to Troyan | 5,189.52 mi (8,351.73 km) |
| West Allis to Tryavna | 5,217.91 mi (8,397.41 km) |
| West Allis to Tutrakan | 5,197.38 mi (8,364.37 km) |
| West Allis to Varna | 5,283.82 mi (8,503.48 km) |
