| Piqua to Candler-McAfee (Georgia) | 443.85 mi (714.31 km) |
| Piqua to Caño Martin Peña (Puerto Rico) | 1,850.22 mi (2,977.65 km) |
| Piqua to Cañon City (Colorado) | 1,125.14 mi (1,810.73 km) |
| Piqua to Canóvanas (Puerto Rico) | 1,859.04 mi (2,991.84 km) |
| Piqua to Canton (Georgia) | 408.14 mi (656.84 km) |
| Piqua to Canton (Illinois) | 306.48 mi (493.23 km) |
| Piqua to Canton (Mississippi) | 612.85 mi (986.29 km) |
| Piqua to Canton (Ohio) | 157.84 mi (254.02 km) |
| Piqua to Canyon (Texas) | 1,029.30 mi (1,656.49 km) |
| Piqua to Canyon Lake (California) | 1,866.16 mi (3,003.29 km) |
| Piqua to Canyon Lake (Texas) | 1,062.03 mi (1,709.18 km) |
| Piqua to Cape Coral (Florida) | 942.07 mi (1,516.11 km) |
| Piqua to Cape Girardeau (Missouri) | 347.15 mi (558.68 km) |
| Piqua to Carbondale (Illinois) | 315.80 mi (508.22 km) |
| Piqua to Carlisle (Pennsylvania) | 371.61 mi (598.05 km) |
