| Potomac Park to Chivasso | 5,957.24 mi (9,587.25 km) |
| Potomac Park to Ciampino | 6,288.00 mi (10,119.55 km) |
| Potomac Park to Cicciano | 6,394.26 mi (10,290.56 km) |
| Potomac Park to Cingoli | 6,221.04 mi (10,011.80 km) |
| Potomac Park to Cinisello Balsamo | 5,980.18 mi (9,624.16 km) |
| Potomac Park to Cinisi | 6,503.32 mi (10,466.08 km) |
| Potomac Park to Cirie | 5,945.78 mi (9,568.81 km) |
| Potomac Park to Ciro Marina | 6,563.59 mi (10,563.08 km) |
| Potomac Park to Cislago | 5,967.11 mi (9,603.14 km) |
| Potomac Park to Cisterna di Latina | 6,306.63 mi (10,149.55 km) |
| Potomac Park to Cisternino | 6,495.03 mi (10,452.74 km) |
| Potomac Park to Citta di Castello | 6,186.16 mi (9,955.66 km) |
| Potomac Park to Citta Sant'Angelo | 6,293.32 mi (10,128.11 km) |
| Potomac Park to Cittadella | 6,053.02 mi (9,741.40 km) |
| Potomac Park to Cittanova | 6,589.09 mi (10,604.12 km) |
