| Blackfoot to Smolyan | 5,999.86 mi (9,655.84 km) |
| Blackfoot to Sofia | 5,897.84 mi (9,491.66 km) |
| Blackfoot to Sopot | 5,937.20 mi (9,555.01 km) |
| Blackfoot to Sozopol | 6,023.89 mi (9,694.52 km) |
| Blackfoot to Sredets | 6,015.93 mi (9,681.71 km) |
| Blackfoot to Stamboliyski | 5,962.64 mi (9,595.94 km) |
| Blackfoot to Stara Zagora | 5,972.82 mi (9,612.33 km) |
| Blackfoot to Svilengrad | 6,026.78 mi (9,699.17 km) |
| Blackfoot to Svishtov | 5,894.14 mi (9,485.70 km) |
| Blackfoot to Targovishte | 5,946.37 mi (9,569.75 km) |
| Blackfoot to Teteven | 5,908.99 mi (9,509.60 km) |
| Blackfoot to Troyan | 5,922.38 mi (9,531.15 km) |
| Blackfoot to Tryavna | 5,942.97 mi (9,564.29 km) |
| Blackfoot to Tutrakan | 5,898.68 mi (9,493.01 km) |
| Blackfoot to Varna | 5,980.18 mi (9,624.17 km) |
