| Desborough to Smolyan | 1,405.61 mi (2,262.10 km) |
| Desborough to Sofia | 1,302.20 mi (2,095.68 km) |
| Desborough to Sopot | 1,360.39 mi (2,189.33 km) |
| Desborough to Sozopol | 1,488.54 mi (2,395.58 km) |
| Desborough to Sredets | 1,471.19 mi (2,367.65 km) |
| Desborough to Stamboliyski | 1,374.43 mi (2,211.94 km) |
| Desborough to Stara Zagora | 1,405.52 mi (2,261.97 km) |
| Desborough to Svilengrad | 1,456.46 mi (2,343.95 km) |
| Desborough to Svishtov | 1,343.83 mi (2,162.69 km) |
| Desborough to Targovishte | 1,408.71 mi (2,267.10 km) |
| Desborough to Teteven | 1,329.73 mi (2,140.00 km) |
| Desborough to Troyan | 1,349.05 mi (2,171.08 km) |
| Desborough to Tryavna | 1,381.01 mi (2,222.53 km) |
| Desborough to Tutrakan | 1,377.99 mi (2,217.66 km) |
| Desborough to Varna | 1,464.30 mi (2,356.57 km) |
