| Decatur to Smolyan | 5,440.87 mi (8,756.24 km) |
| Decatur to Sofia | 5,336.83 mi (8,588.79 km) |
| Decatur to Sopot | 5,391.40 mi (8,676.62 km) |
| Decatur to Sozopol | 5,509.13 mi (8,866.09 km) |
| Decatur to Sredets | 5,494.59 mi (8,842.68 km) |
| Decatur to Stamboliyski | 5,408.27 mi (8,703.77 km) |
| Decatur to Stara Zagora | 5,434.64 mi (8,746.20 km) |
| Decatur to Svilengrad | 5,487.10 mi (8,830.63 km) |
| Decatur to Svishtov | 5,366.58 mi (8,636.67 km) |
| Decatur to Targovishte | 5,428.41 mi (8,736.18 km) |
| Decatur to Teteven | 5,360.97 mi (8,627.64 km) |
| Decatur to Troyan | 5,378.98 mi (8,656.64 km) |
| Decatur to Tryavna | 5,408.19 mi (8,703.65 km) |
| Decatur to Tutrakan | 5,390.52 mi (8,675.21 km) |
| Decatur to Varna | 5,477.16 mi (8,814.65 km) |
