| Piqua to Carlsbad (California) | 1,883.12 mi (3,030.59 km) |
| Piqua to Carlsbad (New Mexico) | 1,231.96 mi (1,982.64 km) |
| Piqua to Carmel (Indiana) | 101.39 mi (163.17 km) |
| Piqua to Carmichael (California) | 1,968.48 mi (3,167.96 km) |
| Piqua to Carney (Maryland) | 413.06 mi (664.75 km) |
| Piqua to Carnot-Moon (Pennsylvania) | 213.56 mi (343.69 km) |
| Piqua to Carol Stream (Illinois) | 236.49 mi (380.60 km) |
| Piqua to Carolina (Puerto Rico) | 1,854.20 mi (2,984.05 km) |
| Piqua to Carolina Forest (South Carolina) | 530.11 mi (853.14 km) |
| Piqua to Carpentersville (Illinois) | 250.72 mi (403.50 km) |
| Piqua to Carpinteria (California) | 1,965.95 mi (3,163.90 km) |
| Piqua to Carrboro (North Carolina) | 404.74 mi (651.37 km) |
| Piqua to Carroll (Iowa) | 568.15 mi (914.35 km) |
| Piqua to Carrollton (Georgia) | 456.22 mi (734.22 km) |
| Piqua to Carrollton (Texas) | 857.69 mi (1,380.32 km) |
