| Sidney to Smolyan | 5,239.82 mi (8,432.68 km) |
| Sidney to Sofia | 5,136.15 mi (8,265.84 km) |
| Sidney to Sopot | 5,192.61 mi (8,356.70 km) |
| Sidney to Sozopol | 5,314.16 mi (8,552.31 km) |
| Sidney to Sredets | 5,298.73 mi (8,527.48 km) |
| Sidney to Stamboliyski | 5,208.10 mi (8,381.63 km) |
| Sidney to Stara Zagora | 5,236.68 mi (8,427.63 km) |
| Sidney to Svilengrad | 5,288.58 mi (8,511.14 km) |
| Sidney to Svishtov | 5,170.67 mi (8,321.39 km) |
| Sidney to Targovishte | 5,233.51 mi (8,422.53 km) |
| Sidney to Teteven | 5,162.05 mi (8,307.51 km) |
| Sidney to Troyan | 5,180.63 mi (8,337.42 km) |
| Sidney to Tryavna | 5,210.92 mi (8,386.17 km) |
| Sidney to Tutrakan | 5,197.37 mi (8,364.36 km) |
| Sidney to Varna | 5,284.18 mi (8,504.07 km) |
