| Port Huron to Butzbach | 4,069.11 mi (6,548.61 km) |
| Port Huron to Buxtehude | 3,999.45 mi (6,436.49 km) |
| Port Huron to Cadolzburg | 4,188.38 mi (6,740.54 km) |
| Port Huron to Calbe | 4,130.22 mi (6,646.95 km) |
| Port Huron to Calw | 4,134.40 mi (6,653.68 km) |
| Port Huron to Castrop-Rauxel | 3,979.57 mi (6,404.50 km) |
| Port Huron to Celle | 4,043.08 mi (6,506.70 km) |
| Port Huron to Cham | 4,264.17 mi (6,862.52 km) |
| Port Huron to Chemnitz | 4,211.75 mi (6,778.16 km) |
| Port Huron to Clausthal-Zellerfeld | 4,081.69 mi (6,568.85 km) |
| Port Huron to Cloppenburg | 3,961.87 mi (6,376.01 km) |
| Port Huron to Coburg | 4,161.48 mi (6,697.25 km) |
| Port Huron to Coesfeld | 3,960.27 mi (6,373.44 km) |
| Port Huron to Cologne | 3,987.15 mi (6,416.69 km) |
| Port Huron to Coswig | 4,224.37 mi (6,798.47 km) |
