| Weslaco to Sinop | 6,857.50 mi (11,036.08 km) |
| Weslaco to Siran | 7,087.95 mi (11,406.95 km) |
| Weslaco to Sirnak | 7,343.45 mi (11,818.15 km) |
| Weslaco to Sirvan | 7,299.27 mi (11,747.05 km) |
| Weslaco to Sivas | 7,040.14 mi (11,330.01 km) |
| Weslaco to Sivasli | 6,834.60 mi (10,999.23 km) |
| Weslaco to Siverek | 7,225.61 mi (11,628.50 km) |
| Weslaco to Sivrice | 7,187.98 mi (11,567.94 km) |
| Weslaco to Sivrihisar | 6,858.37 mi (11,037.48 km) |
| Weslaco to Sogut | 6,779.63 mi (10,910.76 km) |
| Weslaco to Sogutlu | 6,748.08 mi (10,859.99 km) |
| Weslaco to Soke | 6,779.13 mi (10,909.96 km) |
| Weslaco to Solhan | 7,217.65 mi (11,615.69 km) |
| Weslaco to Soma | 6,719.97 mi (10,814.74 km) |
| Weslaco to Sorgun | 6,973.01 mi (11,221.98 km) |
