| Franklin to Smolyan | 5,554.77 mi (8,939.54 km) |
| Franklin to Sofia | 5,451.48 mi (8,773.31 km) |
| Franklin to Sopot | 5,509.22 mi (8,866.24 km) |
| Franklin to Sozopol | 5,633.20 mi (9,065.75 km) |
| Franklin to Sredets | 5,617.21 mi (9,040.03 km) |
| Franklin to Stamboliyski | 5,523.73 mi (8,889.58 km) |
| Franklin to Stara Zagora | 5,553.83 mi (8,938.03 km) |
| Franklin to Svilengrad | 5,605.28 mi (9,020.83 km) |
| Franklin to Svishtov | 5,489.24 mi (8,834.07 km) |
| Franklin to Targovishte | 5,552.67 mi (8,936.16 km) |
| Franklin to Teteven | 5,478.60 mi (8,816.96 km) |
| Franklin to Troyan | 5,497.56 mi (8,847.46 km) |
| Franklin to Tryavna | 5,528.56 mi (8,897.35 km) |
| Franklin to Tutrakan | 5,517.63 mi (8,879.77 km) |
| Franklin to Varna | 5,604.47 mi (9,019.52 km) |
