| Keystone to Butzbach | 4,798.16 mi (7,721.90 km) |
| Keystone to Buxtehude | 4,769.73 mi (7,676.14 km) |
| Keystone to Cadolzburg | 4,913.90 mi (7,908.15 km) |
| Keystone to Calbe | 4,888.99 mi (7,868.08 km) |
| Keystone to Calw | 4,841.80 mi (7,792.13 km) |
| Keystone to Castrop-Rauxel | 4,717.79 mi (7,592.55 km) |
| Keystone to Celle | 4,804.40 mi (7,731.94 km) |
| Keystone to Cham | 4,994.34 mi (8,037.61 km) |
| Keystone to Chemnitz | 4,962.26 mi (7,985.98 km) |
| Keystone to Clausthal-Zellerfeld | 4,833.98 mi (7,779.54 km) |
| Keystone to Cloppenburg | 4,718.99 mi (7,594.48 km) |
| Keystone to Coburg | 4,897.44 mi (7,881.66 km) |
| Keystone to Coesfeld | 4,703.06 mi (7,568.85 km) |
| Keystone to Cologne | 4,716.17 mi (7,589.95 km) |
| Keystone to Coswig | 4,981.01 mi (8,016.17 km) |
