| Ladson to Smolyan | 5,416.18 mi (8,716.50 km) |
| Ladson to Sofia | 5,315.00 mi (8,553.67 km) |
| Ladson to Sopot | 5,377.02 mi (8,653.48 km) |
| Ladson to Sozopol | 5,509.45 mi (8,866.61 km) |
| Ladson to Sredets | 5,491.39 mi (8,837.55 km) |
| Ladson to Stamboliyski | 5,387.80 mi (8,670.82 km) |
| Ladson to Stara Zagora | 5,423.31 mi (8,727.98 km) |
| Ladson to Svilengrad | 5,472.74 mi (8,807.53 km) |
| Ladson to Svishtov | 5,364.66 mi (8,633.58 km) |
| Ladson to Targovishte | 5,429.99 mi (8,738.72 km) |
| Ladson to Teteven | 5,346.40 mi (8,604.21 km) |
| Ladson to Troyan | 5,366.62 mi (8,636.74 km) |
| Ladson to Tryavna | 5,400.07 mi (8,690.58 km) |
| Ladson to Tutrakan | 5,399.72 mi (8,690.01 km) |
| Ladson to Varna | 5,486.05 mi (8,828.94 km) |
