| Castagneto Carducci to Carlsbad (New Mexico) | 5,790.43 mi (9,318.79 km) |
| Castagneto Carducci to Carmel (Indiana) | 4,701.96 mi (7,567.07 km) |
| Castagneto Carducci to Carmichael (California) | 6,034.62 mi (9,711.78 km) |
| Castagneto Carducci to Carney (Maryland) | 4,314.70 mi (6,943.84 km) |
| Castagneto Carducci to Carnot-Moon (Pennsylvania) | 4,429.95 mi (7,129.32 km) |
| Castagneto Carducci to Carol Stream (Illinois) | 4,698.11 mi (7,560.88 km) |
| Castagneto Carducci to Carolina (Puerto Rico) | 4,689.70 mi (7,547.34 km) |
| Castagneto Carducci to Carolina Forest (South Carolina) | 4,652.23 mi (7,487.04 km) |
| Castagneto Carducci to Carpentersville (Illinois) | 4,695.56 mi (7,556.78 km) |
| Castagneto Carducci to Carpinteria (California) | 6,223.48 mi (10,015.72 km) |
| Castagneto Carducci to Carrboro (North Carolina) | 4,569.33 mi (7,353.62 km) |
| Castagneto Carducci to Carroll (Iowa) | 4,953.88 mi (7,972.49 km) |
| Castagneto Carducci to Carrollton (Georgia) | 4,936.32 mi (7,944.23 km) |
| Castagneto Carducci to Carrollton (Texas) | 5,467.57 mi (8,799.21 km) |
| Castagneto Carducci to Carrollwood (Florida) | 5,066.81 mi (8,154.24 km) |
