| South Bend to Smolyan | 5,253.30 mi (8,454.37 km) |
| South Bend to Sofia | 5,149.27 mi (8,286.95 km) |
| South Bend to Sopot | 5,203.97 mi (8,374.99 km) |
| South Bend to Sozopol | 5,322.05 mi (8,565.01 km) |
| South Bend to Sredets | 5,307.41 mi (8,541.46 km) |
| South Bend to Stamboliyski | 5,220.75 mi (8,401.98 km) |
| South Bend to Stara Zagora | 5,247.28 mi (8,444.68 km) |
| South Bend to Svilengrad | 5,299.70 mi (8,529.04 km) |
| South Bend to Svishtov | 5,179.39 mi (8,335.42 km) |
| South Bend to Targovishte | 5,241.33 mi (8,435.10 km) |
| South Bend to Teteven | 5,173.53 mi (8,325.99 km) |
| South Bend to Troyan | 5,191.59 mi (8,355.05 km) |
| South Bend to Tryavna | 5,220.89 mi (8,402.21 km) |
| South Bend to Tutrakan | 5,203.62 mi (8,374.42 km) |
| South Bend to Varna | 5,290.29 mi (8,513.90 km) |
