| Hackettstown to Collegno | 3,989.15 mi (6,419.92 km) |
| Hackettstown to Cologno al Serio | 4,064.07 mi (6,540.48 km) |
| Hackettstown to Cologno Monzese | 4,047.89 mi (6,514.44 km) |
| Hackettstown to Colorno | 4,114.78 mi (6,622.10 km) |
| Hackettstown to Comacchio | 4,199.48 mi (6,758.40 km) |
| Hackettstown to Comiso | 4,592.45 mi (7,390.84 km) |
| Hackettstown to Como | 4,030.55 mi (6,486.54 km) |
| Hackettstown to Concordia Sagittaria | 4,190.76 mi (6,744.37 km) |
| Hackettstown to Concorezzo | 4,048.35 mi (6,515.19 km) |
| Hackettstown to Conegliano | 4,163.54 mi (6,700.56 km) |
| Hackettstown to Conselice | 4,190.91 mi (6,744.61 km) |
| Hackettstown to Conselve | 4,167.71 mi (6,707.28 km) |
| Hackettstown to Conversano | 4,548.15 mi (7,319.55 km) |
| Hackettstown to Copertino | 4,615.86 mi (7,428.52 km) |
| Hackettstown to Copparo | 4,177.71 mi (6,723.38 km) |
