| Friendswood to Sinop | 6,570.27 mi (10,573.83 km) |
| Friendswood to Siran | 6,801.01 mi (10,945.17 km) |
| Friendswood to Sirnak | 7,056.65 mi (11,356.58 km) |
| Friendswood to Sirvan | 7,012.49 mi (11,285.51 km) |
| Friendswood to Sivas | 6,752.83 mi (10,867.63 km) |
| Friendswood to Sivasli | 6,547.55 mi (10,537.26 km) |
| Friendswood to Siverek | 6,938.32 mi (11,166.14 km) |
| Friendswood to Sivrice | 6,900.78 mi (11,105.73 km) |
| Friendswood to Sivrihisar | 6,570.98 mi (10,574.97 km) |
| Friendswood to Sogut | 6,492.28 mi (10,448.32 km) |
| Friendswood to Sogutlu | 6,460.65 mi (10,397.40 km) |
| Friendswood to Soke | 6,492.70 mi (10,448.99 km) |
| Friendswood to Solhan | 6,930.85 mi (11,154.13 km) |
| Friendswood to Soma | 6,433.09 mi (10,353.06 km) |
| Friendswood to Sorgun | 6,685.57 mi (10,759.39 km) |
