| Ponca City to Silver Firs (Washington) | 1,485.16 mi (2,390.13 km) |
| Ponca City to Silver Spring (Maryland) | 1,102.50 mi (1,774.31 km) |
| Ponca City to Silver Springs Shores (Florida) | 1,017.32 mi (1,637.22 km) |
| Ponca City to Silverdale (Washington) | 1,503.24 mi (2,419.24 km) |
| Ponca City to Silverton (Oregon) | 1,452.31 mi (2,337.27 km) |
| Ponca City to Simi Valley (California) | 1,228.72 mi (1,977.44 km) |
| Ponca City to Simpsonville (South Carolina) | 841.22 mi (1,353.82 km) |
| Ponca City to Sioux City (Iowa) | 400.46 mi (644.47 km) |
| Ponca City to Sioux Falls (South Dakota) | 471.28 mi (758.45 km) |
| Ponca City to Skokie (Illinois) | 618.17 mi (994.85 km) |
| Ponca City to Sleepy Hollow (New York) | 1,278.97 mi (2,058.30 km) |
| Ponca City to Slidell (Louisiana) | 610.99 mi (983.30 km) |
| Ponca City to Smithfield (North Carolina) | 1,046.40 mi (1,684.02 km) |
| Ponca City to Smithfield (Utah) | 863.23 mi (1,389.23 km) |
| Ponca City to Smithville (Missouri) | 228.86 mi (368.31 km) |
