| Port Huron to Cockermouth | 3,487.90 mi (5,613.23 km) |
| Port Huron to Colchester | 3,726.09 mi (5,996.57 km) |
| Port Huron to Coleford | 3,592.85 mi (5,782.13 km) |
| Port Huron to Colne | 3,553.19 mi (5,718.30 km) |
| Port Huron to Colwyn Bay | 3,510.33 mi (5,649.33 km) |
| Port Huron to Congleton | 3,570.33 mi (5,745.88 km) |
| Port Huron to Conisbrough | 3,599.12 mi (5,792.22 km) |
| Port Huron to Connahs Quay | 3,536.79 mi (5,691.92 km) |
| Port Huron to Consett | 3,539.77 mi (5,696.70 km) |
| Port Huron to Conwy | 3,505.62 mi (5,641.75 km) |
| Port Huron to Cookstown | 3,361.42 mi (5,409.69 km) |
| Port Huron to Corby | 3,647.06 mi (5,869.38 km) |
| Port Huron to Corfe Mullen | 3,645.65 mi (5,867.10 km) |
| Port Huron to Corsham | 3,619.84 mi (5,825.57 km) |
| Port Huron to Coseley | 3,592.30 mi (5,781.25 km) |
