| Piqua to Camarillo (California) | 1,945.16 mi (3,130.43 km) |
| Piqua to Camas (Washington) | 1,950.65 mi (3,139.27 km) |
| Piqua to Cambridge (Maryland) | 449.85 mi (723.96 km) |
| Piqua to Cambridge (Massachusetts) | 698.05 mi (1,123.40 km) |
| Piqua to Camden (Arkansas) | 657.46 mi (1,058.08 km) |
| Piqua to Camden (New Jersey) | 483.30 mi (777.80 km) |
| Piqua to Cameron Park (California) | 1,950.05 mi (3,138.30 km) |
| Piqua to Camp Pendleton South (California) | 1,885.80 mi (3,034.91 km) |
| Piqua to Camp Springs (Maryland) | 401.38 mi (645.97 km) |
| Piqua to Camp Verde (Arizona) | 1,557.75 mi (2,506.96 km) |
| Piqua to Campbell (California) | 2,027.36 mi (3,262.72 km) |
| Piqua to Campbellsville (Kentucky) | 202.85 mi (326.45 km) |
| Piqua to Campton Hills (Illinois) | 250.40 mi (402.98 km) |
| Piqua to Canby (Oregon) | 1,964.29 mi (3,161.22 km) |
| Piqua to Candelaria (Puerto Rico) | 1,846.02 mi (2,970.88 km) |
