| Sun Prairie to Smolyan | 5,287.84 mi (8,509.95 km) |
| Sun Prairie to Sofia | 5,183.57 mi (8,342.15 km) |
| Sun Prairie to Sopot | 5,235.99 mi (8,426.51 km) |
| Sun Prairie to Sozopol | 5,349.50 mi (8,609.18 km) |
| Sun Prairie to Sredets | 5,335.89 mi (8,587.28 km) |
| Sun Prairie to Stamboliyski | 5,254.32 mi (8,456.00 km) |
| Sun Prairie to Stara Zagora | 5,278.25 mi (8,494.52 km) |
| Sun Prairie to Svilengrad | 5,331.22 mi (8,579.77 km) |
| Sun Prairie to Svishtov | 5,208.17 mi (8,381.74 km) |
| Sun Prairie to Targovishte | 5,268.84 mi (8,479.38 km) |
| Sun Prairie to Teteven | 5,205.75 mi (8,377.84 km) |
| Sun Prairie to Troyan | 5,223.13 mi (8,405.81 km) |
| Sun Prairie to Tryavna | 5,251.13 mi (8,450.88 km) |
| Sun Prairie to Tutrakan | 5,229.27 mi (8,415.69 km) |
| Sun Prairie to Varna | 5,315.58 mi (8,554.60 km) |
