| Piqua to Conyers (Georgia) | 448.35 mi (721.54 km) |
| Piqua to Cookeville (Tennessee) | 284.97 mi (458.61 km) |
| Piqua to Coolidge (Arizona) | 1,586.89 mi (2,553.86 km) |
| Piqua to Coon Rapids (Minnesota) | 576.19 mi (927.29 km) |
| Piqua to Cooper City (Florida) | 1,000.77 mi (1,610.59 km) |
| Piqua to Coos Bay (Oregon) | 2,053.06 mi (3,304.08 km) |
| Piqua to Copiague (New York) | 571.67 mi (920.02 km) |
| Piqua to Coppell (Texas) | 862.86 mi (1,388.64 km) |
| Piqua to Copperas Cove (Texas) | 987.22 mi (1,588.77 km) |
| Piqua to Coral Gables (Florida) | 1,024.11 mi (1,648.15 km) |
| Piqua to Coral Springs (Florida) | 986.02 mi (1,586.84 km) |
| Piqua to Coral Terrace (Florida) | 1,020.80 mi (1,642.81 km) |
| Piqua to Coralville (Iowa) | 398.33 mi (641.04 km) |
| Piqua to Coram (New York) | 592.05 mi (952.81 km) |
| Piqua to Corcoran (California) | 1,927.40 mi (3,101.86 km) |
