| Piqua to Central Point (Oregon) | 1,996.77 mi (3,213.48 km) |
| Piqua to Centralia (Illinois) | 283.92 mi (456.92 km) |
| Piqua to Centralia (Washington) | 1,974.01 mi (3,176.87 km) |
| Piqua to Centreville (Virginia) | 373.88 mi (601.70 km) |
| Piqua to Ceres (California) | 1,968.95 mi (3,168.72 km) |
| Piqua to Cerritos (California) | 1,903.80 mi (3,063.87 km) |
| Piqua to Chalco (Nebraska) | 626.76 mi (1,008.67 km) |
| Piqua to Chalmette (Louisiana) | 775.49 mi (1,248.02 km) |
| Piqua to Chambersburg (Pennsylvania) | 348.76 mi (561.27 km) |
| Piqua to Chamblee (Georgia) | 432.98 mi (696.81 km) |
| Piqua to Champaign (Illinois) | 212.86 mi (342.57 km) |
| Piqua to Champlin (Minnesota) | 579.26 mi (932.24 km) |
| Piqua to Chandler (Arizona) | 1,593.52 mi (2,564.52 km) |
| Piqua to Chanhassen (Minnesota) | 574.68 mi (924.85 km) |
| Piqua to Channahon (Illinois) | 227.65 mi (366.37 km) |
