| Hackettstown to Cividale del Friuli | 4,203.54 mi (6,764.95 km) |
| Hackettstown to Civita Castellana | 4,294.01 mi (6,910.54 km) |
| Hackettstown to Civitanova Marche | 4,315.16 mi (6,944.57 km) |
| Hackettstown to Civitavecchia | 4,274.32 mi (6,878.85 km) |
| Hackettstown to Civitella in Val di Chiana | 4,224.14 mi (6,798.10 km) |
| Hackettstown to Clusone | 4,064.84 mi (6,541.73 km) |
| Hackettstown to Coccaglio | 4,076.56 mi (6,560.59 km) |
| Hackettstown to Codigoro | 4,192.04 mi (6,746.44 km) |
| Hackettstown to Codogno | 4,078.22 mi (6,563.26 km) |
| Hackettstown to Codroipo | 4,189.41 mi (6,742.20 km) |
| Hackettstown to Cogoleto | 4,058.00 mi (6,530.72 km) |
| Hackettstown to Colle di Val d'Elsa | 4,199.44 mi (6,758.35 km) |
| Hackettstown to Colle Salvetti | 4,164.32 mi (6,701.82 km) |
| Hackettstown to Collecchio | 4,113.79 mi (6,620.51 km) |
| Hackettstown to Colleferro | 4,340.90 mi (6,986.01 km) |
