| Drexel Heights to Smolyan | 6,616.92 mi (10,648.90 km) |
| Drexel Heights to Sofia | 6,513.08 mi (10,481.79 km) |
| Drexel Heights to Sopot | 6,559.10 mi (10,555.86 km) |
| Drexel Heights to Sozopol | 6,658.97 mi (10,716.57 km) |
| Drexel Heights to Sredets | 6,648.37 mi (10,699.51 km) |
| Drexel Heights to Stamboliyski | 6,581.26 mi (10,591.52 km) |
| Drexel Heights to Stara Zagora | 6,598.15 mi (10,618.70 km) |
| Drexel Heights to Svilengrad | 6,652.02 mi (10,705.40 km) |
| Drexel Heights to Svishtov | 6,522.95 mi (10,497.68 km) |
| Drexel Heights to Targovishte | 6,579.45 mi (10,588.61 km) |
| Drexel Heights to Teteven | 6,529.71 mi (10,508.56 km) |
| Drexel Heights to Troyan | 6,545.12 mi (10,533.35 km) |
| Drexel Heights to Tryavna | 6,569.38 mi (10,572.40 km) |
| Drexel Heights to Tutrakan | 6,535.09 mi (10,517.21 km) |
| Drexel Heights to Varna | 6,619.33 mi (10,652.79 km) |
