| Hackettstown to Cortona | 4,240.84 mi (6,824.97 km) |
| Hackettstown to Cosenza | 4,574.92 mi (7,362.62 km) |
| Hackettstown to Cossato | 3,999.11 mi (6,435.94 km) |
| Hackettstown to Costa Volpino | 4,072.89 mi (6,554.68 km) |
| Hackettstown to Creazzo | 4,141.32 mi (6,664.81 km) |
| Hackettstown to Crema | 4,070.47 mi (6,550.80 km) |
| Hackettstown to Cremona | 4,093.14 mi (6,587.28 km) |
| Hackettstown to Crevalcore | 4,154.87 mi (6,686.62 km) |
| Hackettstown to Crispiano | 4,567.42 mi (7,350.56 km) |
| Hackettstown to Crosia | 4,587.30 mi (7,382.54 km) |
| Hackettstown to Crotone | 4,621.65 mi (7,437.83 km) |
| Hackettstown to Cuneo | 4,010.50 mi (6,454.27 km) |
| Hackettstown to Cuorgne | 3,982.54 mi (6,409.28 km) |
| Hackettstown to Cusano Milanino | 4,043.13 mi (6,506.80 km) |
| Hackettstown to Cutro | 4,617.72 mi (7,431.50 km) |
