| Marlborough to Smolyan | 4,645.47 mi (7,476.17 km) |
| Marlborough to Sofia | 4,543.11 mi (7,311.42 km) |
| Marlborough to Sopot | 4,603.15 mi (7,408.06 km) |
| Marlborough to Sozopol | 4,731.98 mi (7,615.38 km) |
| Marlborough to Sredets | 4,714.79 mi (7,587.72 km) |
| Marlborough to Stamboliyski | 4,615.73 mi (7,428.30 km) |
| Marlborough to Stara Zagora | 4,648.73 mi (7,481.40 km) |
| Marlborough to Svilengrad | 4,699.17 mi (7,562.58 km) |
| Marlborough to Svishtov | 4,587.34 mi (7,382.61 km) |
| Marlborough to Targovishte | 4,651.95 mi (7,486.60 km) |
| Marlborough to Teteven | 4,572.49 mi (7,358.71 km) |
| Marlborough to Troyan | 4,592.15 mi (7,390.34 km) |
| Marlborough to Tryavna | 4,624.53 mi (7,442.46 km) |
| Marlborough to Tutrakan | 4,619.69 mi (7,434.68 km) |
| Marlborough to Varna | 4,706.34 mi (7,574.13 km) |
