| Hackettstown to Butzbach | 3,870.51 mi (6,228.98 km) |
| Hackettstown to Buxtehude | 3,824.09 mi (6,154.27 km) |
| Hackettstown to Cadolzburg | 3,988.47 mi (6,418.82 km) |
| Hackettstown to Calbe | 3,948.65 mi (6,354.73 km) |
| Hackettstown to Calw | 3,924.63 mi (6,316.08 km) |
| Hackettstown to Castrop-Rauxel | 3,785.57 mi (6,092.28 km) |
| Hackettstown to Celle | 3,862.60 mi (6,216.25 km) |
| Hackettstown to Cham | 4,067.16 mi (6,545.46 km) |
| Hackettstown to Chemnitz | 4,025.79 mi (6,478.89 km) |
| Hackettstown to Clausthal-Zellerfeld | 3,896.15 mi (6,270.25 km) |
| Hackettstown to Cloppenburg | 3,778.55 mi (6,080.99 km) |
| Hackettstown to Coburg | 3,967.13 mi (6,384.48 km) |
| Hackettstown to Coesfeld | 3,768.73 mi (6,065.19 km) |
| Hackettstown to Cologne | 3,788.11 mi (6,096.37 km) |
| Hackettstown to Coswig | 4,041.99 mi (6,504.95 km) |
