| Piqua to Castle Pines (Colorado) | 1,093.39 mi (1,759.64 km) |
| Piqua to Castle Rock (Colorado) | 1,093.45 mi (1,759.73 km) |
| Piqua to Castro Valley (California) | 2,024.36 mi (3,257.89 km) |
| Piqua to Catalina Foothills (Arizona) | 1,573.35 mi (2,532.06 km) |
| Piqua to Cataño (Puerto Rico) | 1,846.60 mi (2,971.82 km) |
| Piqua to Cathedral City (California) | 1,820.04 mi (2,929.07 km) |
| Piqua to Catonsville (Maryland) | 403.29 mi (649.04 km) |
| Piqua to Cave Spring (Virginia) | 304.99 mi (490.84 km) |
| Piqua to Cayce (South Carolina) | 463.53 mi (745.99 km) |
| Piqua to Cayey (Puerto Rico) | 1,864.91 mi (3,001.28 km) |
| Piqua to Cedar City (Utah) | 1,553.48 mi (2,500.08 km) |
| Piqua to Cedar Falls (Iowa) | 456.03 mi (733.91 km) |
| Piqua to Cedar Hill (Texas) | 878.27 mi (1,413.43 km) |
| Piqua to Cedar Lake (Indiana) | 187.20 mi (301.26 km) |
| Piqua to Cedar Mill (Oregon) | 1,968.76 mi (3,168.41 km) |
