| Hackettstown to Cadiz | 3,611.83 mi (5,812.69 km) |
| Hackettstown to Calafell | 3,842.66 mi (6,184.16 km) |
| Hackettstown to Calahorra | 3,645.53 mi (5,866.92 km) |
| Hackettstown to Calasparra | 3,782.28 mi (6,087.00 km) |
| Hackettstown to Calatayud | 3,689.00 mi (5,936.87 km) |
| Hackettstown to Caldas de Montbuy | 3,856.70 mi (6,206.75 km) |
| Hackettstown to Caldas de Reyes | 3,324.76 mi (5,350.69 km) |
| Hackettstown to Calella | 3,880.03 mi (6,244.30 km) |
| Hackettstown to Callosa de Segura | 3,825.19 mi (6,156.05 km) |
| Hackettstown to Calpe | 3,852.47 mi (6,199.96 km) |
| Hackettstown to Calvia | 3,938.80 mi (6,338.89 km) |
| Hackettstown to Camas | 3,597.76 mi (5,790.04 km) |
| Hackettstown to Cambados | 3,319.74 mi (5,342.60 km) |
| Hackettstown to Cambre | 3,321.96 mi (5,346.17 km) |
| Hackettstown to Cambrils | 3,823.05 mi (6,152.60 km) |
