| West Lafayette to Smolyan | 5,337.18 mi (8,589.36 km) |
| West Lafayette to Sofia | 5,233.23 mi (8,422.07 km) |
| West Lafayette to Sopot | 5,288.38 mi (8,510.83 km) |
| West Lafayette to Sozopol | 5,407.30 mi (8,702.22 km) |
| West Lafayette to Sredets | 5,392.48 mi (8,678.36 km) |
| West Lafayette to Stamboliyski | 5,304.84 mi (8,537.31 km) |
| West Lafayette to Stara Zagora | 5,331.88 mi (8,580.83 km) |
| West Lafayette to Svilengrad | 5,384.18 mi (8,665.00 km) |
| West Lafayette to Svishtov | 5,264.43 mi (8,472.29 km) |
| West Lafayette to Targovishte | 5,326.59 mi (8,572.32 km) |
| West Lafayette to Teteven | 5,257.90 mi (8,461.77 km) |
| West Lafayette to Troyan | 5,276.09 mi (8,491.05 km) |
| West Lafayette to Tryavna | 5,305.64 mi (8,538.60 km) |
| West Lafayette to Tutrakan | 5,289.24 mi (8,512.21 km) |
| West Lafayette to Varna | 5,375.95 mi (8,651.76 km) |
