| Weslaco to Smolyan | 6,495.61 mi (10,453.67 km) |
| Weslaco to Sofia | 6,392.17 mi (10,287.20 km) |
| Weslaco to Sopot | 6,449.37 mi (10,379.25 km) |
| Weslaco to Sozopol | 6,571.91 mi (10,576.47 km) |
| Weslaco to Sredets | 6,556.31 mi (10,551.36 km) |
| Weslaco to Stamboliyski | 6,464.31 mi (10,403.30 km) |
| Weslaco to Stara Zagora | 6,493.71 mi (10,450.62 km) |
| Weslaco to Svilengrad | 6,545.39 mi (10,533.79 km) |
| Weslaco to Svishtov | 6,428.26 mi (10,345.29 km) |
| Weslaco to Targovishte | 6,491.29 mi (10,446.73 km) |
| Weslaco to Teteven | 6,418.77 mi (10,330.01 km) |
| Weslaco to Troyan | 6,437.55 mi (10,360.23 km) |
| Weslaco to Tryavna | 6,468.17 mi (10,409.51 km) |
| Weslaco to Tutrakan | 6,455.38 mi (10,388.93 km) |
| Weslaco to Varna | 6,542.20 mi (10,528.65 km) |
