| Greenbelt to Cognac | 3,785.98 mi (6,092.95 km) |
| Greenbelt to Cogolin | 4,163.60 mi (6,700.67 km) |
| Greenbelt to Colmar | 4,052.15 mi (6,521.30 km) |
| Greenbelt to Colombes | 3,814.67 mi (6,139.12 km) |
| Greenbelt to Colomiers | 3,918.24 mi (6,305.80 km) |
| Greenbelt to Combs-la-Ville | 3,834.19 mi (6,170.53 km) |
| Greenbelt to Comines | 3,799.95 mi (6,115.43 km) |
| Greenbelt to Compiegne | 3,826.11 mi (6,157.52 km) |
| Greenbelt to Concarneau | 3,574.09 mi (5,751.94 km) |
| Greenbelt to Conde-sur-l'Escaut | 3,831.57 mi (6,166.32 km) |
| Greenbelt to Conflans-Sainte-Honorine | 3,806.26 mi (6,125.58 km) |
| Greenbelt to Corbas | 4,017.93 mi (6,466.24 km) |
| Greenbelt to Corbeil-Essonnes | 3,832.34 mi (6,167.56 km) |
| Greenbelt to Cormeilles-en-Parisis | 3,811.25 mi (6,133.61 km) |
| Greenbelt to Cosne sur Loire | 3,883.08 mi (6,249.21 km) |
