| Ruston to Smolyan | 5,951.60 mi (9,578.18 km) |
| Ruston to Sofia | 5,848.04 mi (9,411.51 km) |
| Ruston to Sopot | 5,904.84 mi (9,502.93 km) |
| Ruston to Sozopol | 6,026.80 mi (9,699.21 km) |
| Ruston to Sredets | 6,011.31 mi (9,674.27 km) |
| Ruston to Stamboliyski | 5,920.08 mi (9,527.45 km) |
| Ruston to Stara Zagora | 5,949.04 mi (9,574.05 km) |
| Ruston to Svilengrad | 6,000.84 mi (9,657.42 km) |
| Ruston to Svishtov | 5,883.26 mi (9,468.19 km) |
| Ruston to Targovishte | 5,946.17 mi (9,569.43 km) |
| Ruston to Teteven | 5,874.27 mi (9,453.72 km) |
| Ruston to Troyan | 5,892.93 mi (9,483.76 km) |
| Ruston to Tryavna | 5,923.37 mi (9,532.74 km) |
| Ruston to Tutrakan | 5,910.08 mi (9,511.36 km) |
| Ruston to Varna | 5,996.89 mi (9,651.07 km) |
