| Kocaeli to Butzbach | 1,219.03 mi (1,961.84 km) |
| Kocaeli to Buxtehude | 1,285.88 mi (2,069.42 km) |
| Kocaeli to Cadolzburg | 1,101.24 mi (1,772.27 km) |
| Kocaeli to Calbe | 1,152.45 mi (1,854.69 km) |
| Kocaeli to Calw | 1,170.46 mi (1,883.68 km) |
| Kocaeli to Castrop-Rauxel | 1,304.97 mi (2,100.15 km) |
| Kocaeli to Celle | 1,239.72 mi (1,995.14 km) |
| Kocaeli to Cham | 1,022.40 mi (1,645.39 km) |
| Kocaeli to Chemnitz | 1,070.10 mi (1,722.15 km) |
| Kocaeli to Clausthal-Zellerfeld | 1,200.14 mi (1,931.43 km) |
| Kocaeli to Cloppenburg | 1,320.07 mi (2,124.44 km) |
| Kocaeli to Coburg | 1,123.03 mi (1,807.34 km) |
| Kocaeli to Coesfeld | 1,322.99 mi (2,129.14 km) |
| Kocaeli to Cologne | 1,301.44 mi (2,094.46 km) |
| Kocaeli to Coswig | 1,058.30 mi (1,703.16 km) |
