| Rock Island to Cockermouth | 3,859.52 mi (6,211.29 km) |
| Rock Island to Colchester | 4,103.96 mi (6,604.69 km) |
| Rock Island to Coleford | 3,975.23 mi (6,397.51 km) |
| Rock Island to Colne | 3,926.91 mi (6,319.75 km) |
| Rock Island to Colwyn Bay | 3,888.04 mi (6,257.20 km) |
| Rock Island to Congleton | 3,946.92 mi (6,351.96 km) |
| Rock Island to Conisbrough | 3,973.31 mi (6,394.42 km) |
| Rock Island to Connahs Quay | 3,914.10 mi (6,299.14 km) |
| Rock Island to Consett | 3,908.89 mi (6,290.75 km) |
| Rock Island to Conwy | 3,883.51 mi (6,249.91 km) |
| Rock Island to Cookstown | 3,736.57 mi (6,013.43 km) |
| Rock Island to Corby | 4,024.58 mi (6,476.93 km) |
| Rock Island to Corfe Mullen | 4,031.10 mi (6,487.42 km) |
| Rock Island to Corsham | 4,003.06 mi (6,442.31 km) |
| Rock Island to Coseley | 3,971.17 mi (6,390.98 km) |
