| Greenbelt to Butzbach | 4,037.26 mi (6,497.35 km) |
| Greenbelt to Buxtehude | 3,992.09 mi (6,424.65 km) |
| Greenbelt to Cadolzburg | 4,155.08 mi (6,686.95 km) |
| Greenbelt to Calbe | 4,116.35 mi (6,624.63 km) |
| Greenbelt to Calw | 4,090.50 mi (6,583.02 km) |
| Greenbelt to Castrop-Rauxel | 3,952.65 mi (6,361.18 km) |
| Greenbelt to Celle | 4,030.38 mi (6,486.27 km) |
| Greenbelt to Cham | 4,233.93 mi (6,813.86 km) |
| Greenbelt to Chemnitz | 4,193.25 mi (6,748.39 km) |
| Greenbelt to Clausthal-Zellerfeld | 4,063.67 mi (6,539.85 km) |
| Greenbelt to Cloppenburg | 3,946.23 mi (6,350.84 km) |
| Greenbelt to Coburg | 4,134.12 mi (6,653.22 km) |
| Greenbelt to Coesfeld | 3,935.97 mi (6,334.34 km) |
| Greenbelt to Cologne | 3,954.86 mi (6,364.74 km) |
| Greenbelt to Coswig | 4,209.63 mi (6,774.74 km) |
