| Ponca City to Sinop | 6,217.50 mi (10,006.10 km) |
| Ponca City to Siran | 6,440.30 mi (10,364.66 km) |
| Ponca City to Sirnak | 6,692.31 mi (10,770.22 km) |
| Ponca City to Sirvan | 6,647.99 mi (10,698.90 km) |
| Ponca City to Sivas | 6,402.07 mi (10,303.14 km) |
| Ponca City to Sivasli | 6,231.53 mi (10,028.67 km) |
| Ponca City to Siverek | 6,586.12 mi (10,599.34 km) |
| Ponca City to Sivrice | 6,545.93 mi (10,534.66 km) |
| Ponca City to Sivrihisar | 6,243.09 mi (10,047.29 km) |
| Ponca City to Sogut | 6,167.09 mi (9,924.97 km) |
| Ponca City to Sogutlu | 6,130.25 mi (9,865.68 km) |
| Ponca City to Soke | 6,189.41 mi (9,960.89 km) |
| Ponca City to Solhan | 6,567.04 mi (10,568.62 km) |
| Ponca City to Soma | 6,121.89 mi (9,852.23 km) |
| Ponca City to Sorgun | 6,341.73 mi (10,206.04 km) |
