| Hackettstown to Cocentaina | 3,826.13 mi (6,157.56 km) |
| Hackettstown to Coin | 3,683.91 mi (5,928.68 km) |
| Hackettstown to Colindres | 3,546.10 mi (5,706.90 km) |
| Hackettstown to Collado-Villalba | 3,598.23 mi (5,790.79 km) |
| Hackettstown to Colmenar Viejo | 3,608.99 mi (5,808.11 km) |
| Hackettstown to Colmenarejo | 3,599.95 mi (5,793.56 km) |
| Hackettstown to Conil de la Frontera | 3,630.91 mi (5,843.39 km) |
| Hackettstown to Consuegra | 3,652.35 mi (5,877.89 km) |
| Hackettstown to Corbera de Llobregat | 3,852.60 mi (6,200.16 km) |
| Hackettstown to Cordoba | 3,644.09 mi (5,864.60 km) |
| Hackettstown to Coria del Rio | 3,600.62 mi (5,794.64 km) |
| Hackettstown to Crevillente | 3,824.51 mi (6,154.95 km) |
| Hackettstown to Cuarte de Huerva | 3,715.46 mi (5,979.46 km) |
| Hackettstown to Cubellas | 3,847.19 mi (6,191.45 km) |
| Hackettstown to Cuellar | 3,561.57 mi (5,731.79 km) |
