| Iselin to Smolyan | 4,834.07 mi (7,779.68 km) |
| Iselin to Sofia | 4,731.76 mi (7,615.02 km) |
| Iselin to Sopot | 4,791.90 mi (7,711.82 km) |
| Iselin to Sozopol | 4,920.86 mi (7,919.35 km) |
| Iselin to Sredets | 4,903.65 mi (7,891.66 km) |
| Iselin to Stamboliyski | 4,804.40 mi (7,731.93 km) |
| Iselin to Stara Zagora | 4,837.51 mi (7,785.22 km) |
| Iselin to Svilengrad | 4,887.91 mi (7,866.33 km) |
| Iselin to Svishtov | 4,776.21 mi (7,686.57 km) |
| Iselin to Targovishte | 4,840.84 mi (7,790.58 km) |
| Iselin to Teteven | 4,761.24 mi (7,662.48 km) |
| Iselin to Troyan | 4,780.92 mi (7,694.15 km) |
| Iselin to Tryavna | 4,813.34 mi (7,746.33 km) |
| Iselin to Tutrakan | 4,808.61 mi (7,738.71 km) |
| Iselin to Varna | 4,895.26 mi (7,878.16 km) |
