| Langley Park to Cortona | 4,408.21 mi (7,094.33 km) |
| Langley Park to Cosenza | 4,740.92 mi (7,629.78 km) |
| Langley Park to Cossato | 4,167.02 mi (6,706.17 km) |
| Langley Park to Costa Volpino | 4,241.44 mi (6,825.93 km) |
| Langley Park to Creazzo | 4,310.01 mi (6,936.28 km) |
| Langley Park to Crema | 4,238.63 mi (6,821.41 km) |
| Langley Park to Cremona | 4,261.23 mi (6,857.79 km) |
| Langley Park to Crevalcore | 4,322.97 mi (6,957.15 km) |
| Langley Park to Crispiano | 4,734.65 mi (7,619.68 km) |
| Langley Park to Crosia | 4,753.68 mi (7,650.30 km) |
| Langley Park to Crotone | 4,787.82 mi (7,705.25 km) |
| Langley Park to Cuneo | 4,177.40 mi (6,722.87 km) |
| Langley Park to Cuorgne | 4,150.20 mi (6,679.10 km) |
| Langley Park to Cusano Milanino | 4,211.29 mi (6,777.41 km) |
| Langley Park to Cutro | 4,783.80 mi (7,698.79 km) |
