| Langley Park to Chivasso | 4,166.70 mi (6,705.65 km) |
| Langley Park to Ciampino | 4,486.74 mi (7,220.71 km) |
| Langley Park to Cicciano | 4,602.27 mi (7,406.64 km) |
| Langley Park to Cingoli | 4,458.37 mi (7,175.05 km) |
| Langley Park to Cinisello Balsamo | 4,212.72 mi (6,779.72 km) |
| Langley Park to Cinisi | 4,641.24 mi (7,469.36 km) |
| Langley Park to Cirie | 4,152.86 mi (6,683.38 km) |
| Langley Park to Ciro Marina | 4,777.27 mi (7,688.27 km) |
| Langley Park to Cislago | 4,198.81 mi (6,757.33 km) |
| Langley Park to Cisterna di Latina | 4,504.28 mi (7,248.94 km) |
| Langley Park to Cisternino | 4,738.28 mi (7,625.52 km) |
| Langley Park to Citta di Castello | 4,412.94 mi (7,101.94 km) |
| Langley Park to Citta Sant'Angelo | 4,524.72 mi (7,281.84 km) |
| Langley Park to Cittadella | 4,318.84 mi (6,950.50 km) |
| Langley Park to Cittanova | 4,769.84 mi (7,676.32 km) |
