| Boynton Beach to Smolyan | 5,719.48 mi (9,204.61 km) |
| Boynton Beach to Sofia | 5,620.80 mi (9,045.80 km) |
| Boynton Beach to Sopot | 5,685.69 mi (9,150.24 km) |
| Boynton Beach to Sozopol | 5,823.65 mi (9,372.26 km) |
| Boynton Beach to Sredets | 5,804.13 mi (9,340.85 km) |
| Boynton Beach to Stamboliyski | 5,693.44 mi (9,162.71 km) |
| Boynton Beach to Stara Zagora | 5,732.94 mi (9,226.27 km) |
| Boynton Beach to Svilengrad | 5,780.39 mi (9,302.64 km) |
| Boynton Beach to Svishtov | 5,679.33 mi (9,139.99 km) |
| Boynton Beach to Targovishte | 5,745.60 mi (9,246.65 km) |
| Boynton Beach to Teteven | 5,655.32 mi (9,101.36 km) |
| Boynton Beach to Troyan | 5,676.36 mi (9,135.21 km) |
| Boynton Beach to Tryavna | 5,711.46 mi (9,191.71 km) |
| Boynton Beach to Tutrakan | 5,719.17 mi (9,204.11 km) |
| Boynton Beach to Varna | 5,804.46 mi (9,341.38 km) |
