| Secaucus to Smolyan | 4,814.70 mi (7,748.51 km) |
| Secaucus to Sofia | 4,712.37 mi (7,583.82 km) |
| Secaucus to Sopot | 4,772.48 mi (7,680.57 km) |
| Secaucus to Sozopol | 4,901.37 mi (7,888.00 km) |
| Secaucus to Sredets | 4,884.18 mi (7,860.33 km) |
| Secaucus to Stamboliyski | 4,785.00 mi (7,700.72 km) |
| Secaucus to Stara Zagora | 4,818.07 mi (7,753.94 km) |
| Secaucus to Svilengrad | 4,868.49 mi (7,835.08 km) |
| Secaucus to Svishtov | 4,756.73 mi (7,655.22 km) |
| Secaucus to Targovishte | 4,821.35 mi (7,759.22 km) |
| Secaucus to Teteven | 4,741.82 mi (7,631.22 km) |
| Secaucus to Troyan | 4,761.49 mi (7,662.88 km) |
| Secaucus to Tryavna | 4,793.89 mi (7,715.03 km) |
| Secaucus to Tutrakan | 4,789.09 mi (7,707.30 km) |
| Secaucus to Varna | 4,875.74 mi (7,846.75 km) |
