| Williamsport to Sinop | 5,298.10 mi (8,526.48 km) |
| Williamsport to Siran | 5,533.63 mi (8,905.52 km) |
| Williamsport to Sirnak | 5,790.66 mi (9,319.17 km) |
| Williamsport to Sirvan | 5,746.91 mi (9,248.76 km) |
| Williamsport to Sivas | 5,478.23 mi (8,816.35 km) |
| Williamsport to Sivasli | 5,255.37 mi (8,457.70 km) |
| Williamsport to Siverek | 5,663.75 mi (9,114.93 km) |
| Williamsport to Sivrice | 5,628.31 mi (9,057.89 km) |
| Williamsport to Sivrihisar | 5,283.76 mi (8,503.39 km) |
| Williamsport to Sogut | 5,204.07 mi (8,375.13 km) |
| Williamsport to Sogutlu | 5,175.07 mi (8,328.46 km) |
| Williamsport to Soke | 5,196.60 mi (8,363.13 km) |
| Williamsport to Solhan | 5,665.22 mi (9,117.28 km) |
| Williamsport to Soma | 5,139.49 mi (8,271.22 km) |
| Williamsport to Sorgun | 5,406.71 mi (8,701.26 km) |
