| Greenbelt to Chivasso | 4,162.46 mi (6,698.84 km) |
| Greenbelt to Ciampino | 4,482.44 mi (7,213.79 km) |
| Greenbelt to Cicciano | 4,597.97 mi (7,399.72 km) |
| Greenbelt to Cingoli | 4,454.15 mi (7,168.26 km) |
| Greenbelt to Cinisello Balsamo | 4,208.53 mi (6,772.97 km) |
| Greenbelt to Cinisi | 4,636.81 mi (7,462.23 km) |
| Greenbelt to Cirie | 4,148.62 mi (6,676.56 km) |
| Greenbelt to Ciro Marina | 4,772.96 mi (7,681.33 km) |
| Greenbelt to Cislago | 4,194.62 mi (6,750.58 km) |
| Greenbelt to Cisterna di Latina | 4,499.97 mi (7,242.01 km) |
| Greenbelt to Cisternino | 4,734.03 mi (7,618.68 km) |
| Greenbelt to Citta di Castello | 4,408.70 mi (7,095.12 km) |
| Greenbelt to Citta Sant'Angelo | 4,520.48 mi (7,275.01 km) |
| Greenbelt to Cittadella | 4,314.69 mi (6,943.83 km) |
| Greenbelt to Cittanova | 4,765.47 mi (7,669.29 km) |
