| North Decatur to Smolyan | 5,553.94 mi (8,938.21 km) |
| North Decatur to Sofia | 5,451.57 mi (8,773.45 km) |
| North Decatur to Sopot | 5,511.52 mi (8,869.94 km) |
| North Decatur to Sozopol | 5,639.87 mi (9,076.49 km) |
| North Decatur to Sredets | 5,622.84 mi (9,049.08 km) |
| North Decatur to Stamboliyski | 5,524.19 mi (8,890.32 km) |
| North Decatur to Stara Zagora | 5,557.03 mi (8,943.18 km) |
| North Decatur to Svilengrad | 5,607.55 mi (9,024.48 km) |
| North Decatur to Svishtov | 5,495.29 mi (8,843.82 km) |
| North Decatur to Targovishte | 5,559.75 mi (8,947.56 km) |
| North Decatur to Teteven | 5,480.86 mi (8,820.59 km) |
| North Decatur to Troyan | 5,500.47 mi (8,852.15 km) |
| North Decatur to Tryavna | 5,532.73 mi (8,904.07 km) |
| North Decatur to Tutrakan | 5,527.02 mi (8,894.88 km) |
| North Decatur to Varna | 5,613.73 mi (9,034.43 km) |
