| Piqua to Cibolo (Texas) | 1,075.55 mi (1,730.93 km) |
| Piqua to Cicero (Illinois) | 217.46 mi (349.96 km) |
| Piqua to Cimarron Hills (Colorado) | 1,091.70 mi (1,756.92 km) |
| Piqua to Cincinnati (Ohio) | 71.11 mi (114.45 km) |
| Piqua to Cinco Ranch (Texas) | 969.29 mi (1,559.92 km) |
| Piqua to Circleville (Ohio) | 79.02 mi (127.17 km) |
| Piqua to Citrus (California) | 1,887.65 mi (3,037.88 km) |
| Piqua to Citrus Heights (California) | 1,965.36 mi (3,162.94 km) |
| Piqua to Citrus Park (Florida) | 839.96 mi (1,351.78 km) |
| Piqua to Claiborne (Louisiana) | 686.84 mi (1,105.35 km) |
| Piqua to Claremont (California) | 1,878.22 mi (3,022.70 km) |
| Piqua to Claremont (New Hampshire) | 652.21 mi (1,049.64 km) |
| Piqua to Claremore (Oklahoma) | 670.71 mi (1,079.40 km) |
| Piqua to Clarksburg (Maryland) | 376.40 mi (605.76 km) |
| Piqua to Clarksburg (West Virginia) | 216.75 mi (348.82 km) |
