| Langley Park to Collegno | 4,156.57 mi (6,689.35 km) |
| Langley Park to Cologno al Serio | 4,232.37 mi (6,811.34 km) |
| Langley Park to Cologno Monzese | 4,216.05 mi (6,785.07 km) |
| Langley Park to Colorno | 4,282.83 mi (6,892.55 km) |
| Langley Park to Comacchio | 4,367.83 mi (7,029.34 km) |
| Langley Park to Comiso | 4,755.95 mi (7,653.96 km) |
| Langley Park to Como | 4,198.85 mi (6,757.39 km) |
| Langley Park to Concordia Sagittaria | 4,359.89 mi (7,016.56 km) |
| Langley Park to Concorezzo | 4,216.57 mi (6,785.91 km) |
| Langley Park to Conegliano | 4,332.61 mi (6,972.66 km) |
| Langley Park to Conselice | 4,359.05 mi (7,015.22 km) |
| Langley Park to Conselve | 4,336.31 mi (6,978.62 km) |
| Langley Park to Conversano | 4,715.58 mi (7,588.99 km) |
| Langley Park to Copertino | 4,783.15 mi (7,697.73 km) |
| Langley Park to Copparo | 4,346.10 mi (6,994.37 km) |
