| Piqua to Smyrna (Delaware) | 462.55 mi (744.40 km) |
| Piqua to Smyrna (Georgia) | 434.67 mi (699.53 km) |
| Piqua to Smyrna (Tennessee) | 314.46 mi (506.07 km) |
| Piqua to Snellville (Georgia) | 435.10 mi (700.23 km) |
| Piqua to Snoqualmie (Washington) | 1,921.18 mi (3,091.84 km) |
| Piqua to Snyder (Texas) | 1,056.99 mi (1,701.05 km) |
| Piqua to Socastee (South Carolina) | 531.81 mi (855.86 km) |
| Piqua to Socorro (Texas) | 1,360.43 mi (2,189.40 km) |
| Piqua to Soddy-Daisy (Tennessee) | 341.90 mi (550.24 km) |
| Piqua to Solana Beach (California) | 1,885.50 mi (3,034.42 km) |
| Piqua to Soledad (California) | 2,013.19 mi (3,239.92 km) |
| Piqua to Solon (Ohio) | 169.76 mi (273.20 km) |
| Piqua to Somers Point (New Jersey) | 515.05 mi (828.90 km) |
| Piqua to Somerset (Kentucky) | 212.85 mi (342.54 km) |
| Piqua to Somerset (New Jersey) | 513.52 mi (826.44 km) |
