| Hackettstown to Castelfidardo | 4,301.22 mi (6,922.15 km) |
| Hackettstown to Castelfiorentino | 4,185.29 mi (6,735.57 km) |
| Hackettstown to Castelfranco di Sopra | 4,210.07 mi (6,775.45 km) |
| Hackettstown to Castelfranco di Sotto | 4,172.45 mi (6,714.92 km) |
| Hackettstown to Castelfranco Emilia | 4,154.80 mi (6,686.51 km) |
| Hackettstown to Castelfranco Veneto | 4,155.75 mi (6,688.04 km) |
| Hackettstown to Castellabate | 4,480.07 mi (7,209.97 km) |
| Hackettstown to Castellammare del Golfo | 4,472.74 mi (7,198.18 km) |
| Hackettstown to Castellammare di Stabia | 4,443.57 mi (7,151.24 km) |
| Hackettstown to Castellamonte | 3,985.47 mi (6,413.99 km) |
| Hackettstown to Castellana Grotte | 4,553.54 mi (7,328.22 km) |
| Hackettstown to Castellaneta | 4,553.11 mi (7,327.52 km) |
| Hackettstown to Castellanza | 4,028.88 mi (6,483.85 km) |
| Hackettstown to Castellarano | 4,144.28 mi (6,669.57 km) |
| Hackettstown to Castelleone | 4,076.12 mi (6,559.89 km) |
