| Piqua to Cullman (Alabama) | 436.71 mi (702.81 km) |
| Piqua to Culpeper (Virginia) | 353.31 mi (568.60 km) |
| Piqua to Culver City (California) | 1,917.40 mi (3,085.75 km) |
| Piqua to Cumberland (Maryland) | 292.76 mi (471.15 km) |
| Piqua to Cupertino (California) | 2,031.46 mi (3,269.32 km) |
| Piqua to Cutler Bay (Florida) | 1,031.90 mi (1,660.68 km) |
| Piqua to Cutlerville (Michigan) | 200.01 mi (321.89 km) |
| Piqua to Cuyahoga Falls (Ohio) | 158.99 mi (255.87 km) |
| Piqua to Cypress (California) | 1,903.59 mi (3,063.53 km) |
| Piqua to Cypress Gardens (Florida) | 851.84 mi (1,370.90 km) |
| Piqua to Cypress Lake (Florida) | 950.04 mi (1,528.93 km) |
| Piqua to D'Iberville (Mississippi) | 718.20 mi (1,155.84 km) |
| Piqua to Dakota Ridge (Colorado) | 1,105.61 mi (1,779.31 km) |
| Piqua to Dale City (Virginia) | 382.55 mi (615.66 km) |
| Piqua to Dallas (Georgia) | 432.08 mi (695.37 km) |
