| Union Park to Smolyan | 5,674.35 mi (9,131.98 km) |
| Union Park to Sofia | 5,574.44 mi (8,971.19 km) |
| Union Park to Sopot | 5,638.07 mi (9,073.59 km) |
| Union Park to Sozopol | 5,773.58 mi (9,291.68 km) |
| Union Park to Sredets | 5,754.73 mi (9,261.34 km) |
| Union Park to Stamboliyski | 5,647.21 mi (9,088.31 km) |
| Union Park to Stara Zagora | 5,684.92 mi (9,148.99 km) |
| Union Park to Svilengrad | 5,733.32 mi (9,226.89 km) |
| Union Park to Svishtov | 5,628.92 mi (9,058.87 km) |
| Union Park to Targovishte | 5,694.81 mi (9,164.90 km) |
| Union Park to Teteven | 5,607.56 mi (9,024.49 km) |
| Union Park to Troyan | 5,628.23 mi (9,057.76 km) |
| Union Park to Tryavna | 5,662.61 mi (9,113.08 km) |
| Union Park to Tutrakan | 5,666.55 mi (9,119.44 km) |
| Union Park to Varna | 5,752.40 mi (9,257.60 km) |
