| Piqua to Clemson (South Carolina) | 385.79 mi (620.87 km) |
| Piqua to Clermont (Florida) | 815.43 mi (1,312.31 km) |
| Piqua to Cleveland (Mississippi) | 568.98 mi (915.68 km) |
| Piqua to Cleveland (Ohio) | 162.35 mi (261.28 km) |
| Piqua to Cleveland (Tennessee) | 345.02 mi (555.26 km) |
| Piqua to Cleveland Heights (Ohio) | 168.74 mi (271.55 km) |
| Piqua to Cliffside Park (New Jersey) | 540.64 mi (870.08 km) |
| Piqua to Clifton (Colorado) | 1,287.11 mi (2,071.40 km) |
| Piqua to Clifton (New Jersey) | 531.87 mi (855.96 km) |
| Piqua to Clinton (Iowa) | 333.80 mi (537.20 km) |
| Piqua to Clinton (Maryland) | 403.14 mi (648.79 km) |
| Piqua to Clinton (Mississippi) | 636.44 mi (1,024.26 km) |
| Piqua to Clinton (Utah) | 1,453.94 mi (2,339.89 km) |
| Piqua to Clive (Iowa) | 508.94 mi (819.06 km) |
| Piqua to Cloquet (Minnesota) | 613.66 mi (987.59 km) |
