| Niles to Smolyan | 5,293.03 mi (8,518.30 km) |
| Niles to Sofia | 5,188.87 mi (8,350.68 km) |
| Niles to Sopot | 5,242.67 mi (8,437.26 km) |
| Niles to Sozopol | 5,358.91 mi (8,624.33 km) |
| Niles to Sredets | 5,344.69 mi (8,601.45 km) |
| Niles to Stamboliyski | 5,260.07 mi (8,465.27 km) |
| Niles to Stara Zagora | 5,285.56 mi (8,506.28 km) |
| Niles to Svilengrad | 5,338.22 mi (8,591.03 km) |
| Niles to Svishtov | 5,216.76 mi (8,395.56 km) |
| Niles to Targovishte | 5,278.20 mi (8,494.44 km) |
| Niles to Teteven | 5,212.29 mi (8,388.38 km) |
| Niles to Troyan | 5,230.08 mi (8,417.01 km) |
| Niles to Tryavna | 5,258.86 mi (8,463.32 km) |
| Niles to Tutrakan | 5,239.71 mi (8,432.50 km) |
| Niles to Varna | 5,326.26 mi (8,571.79 km) |
