| Colonia to Butzbach | 3,861.76 mi (6,214.90 km) |
| Colonia to Buxtehude | 3,817.35 mi (6,143.42 km) |
| Colonia to Cadolzburg | 3,979.54 mi (6,404.45 km) |
| Colonia to Calbe | 3,941.31 mi (6,342.92 km) |
| Colonia to Calw | 3,914.88 mi (6,300.39 km) |
| Colonia to Castrop-Rauxel | 3,777.26 mi (6,078.91 km) |
| Colonia to Celle | 3,855.40 mi (6,204.66 km) |
| Colonia to Cham | 4,058.43 mi (6,531.41 km) |
| Colonia to Chemnitz | 4,018.04 mi (6,466.40 km) |
| Colonia to Clausthal-Zellerfeld | 3,888.50 mi (6,257.94 km) |
| Colonia to Cloppenburg | 3,771.16 mi (6,069.10 km) |
| Colonia to Coburg | 3,958.69 mi (6,370.89 km) |
| Colonia to Coesfeld | 3,760.65 mi (6,052.17 km) |
| Colonia to Cologne | 3,779.36 mi (6,082.30 km) |
| Colonia to Coswig | 4,034.53 mi (6,492.94 km) |
