| Belvidere to Smolyan | 5,320.17 mi (8,561.99 km) |
| Belvidere to Sofia | 5,215.95 mi (8,394.27 km) |
| Belvidere to Sopot | 5,269.12 mi (8,479.84 km) |
| Belvidere to Sozopol | 5,384.11 mi (8,664.89 km) |
| Belvidere to Sredets | 5,370.17 mi (8,642.46 km) |
| Belvidere to Stamboliyski | 5,286.95 mi (8,508.53 km) |
| Belvidere to Stara Zagora | 5,311.73 mi (8,548.40 km) |
| Belvidere to Svilengrad | 5,364.54 mi (8,633.39 km) |
| Belvidere to Svishtov | 5,242.33 mi (8,436.71 km) |
| Belvidere to Targovishte | 5,303.41 mi (8,535.02 km) |
| Belvidere to Teteven | 5,238.81 mi (8,431.05 km) |
| Belvidere to Troyan | 5,256.41 mi (8,459.37 km) |
| Belvidere to Tryavna | 5,284.83 mi (8,505.12 km) |
| Belvidere to Tutrakan | 5,264.41 mi (8,472.25 km) |
| Belvidere to Varna | 5,350.86 mi (8,611.38 km) |
