| Grayslake to Cockermouth | 3,724.43 mi (5,993.89 km) |
| Grayslake to Colchester | 3,967.54 mi (6,385.15 km) |
| Grayslake to Coleford | 3,837.77 mi (6,176.29 km) |
| Grayslake to Colne | 3,791.37 mi (6,101.62 km) |
| Grayslake to Colwyn Bay | 3,751.59 mi (6,037.60 km) |
| Grayslake to Congleton | 3,810.74 mi (6,132.79 km) |
| Grayslake to Conisbrough | 3,837.68 mi (6,176.14 km) |
| Grayslake to Connahs Quay | 3,777.74 mi (6,079.69 km) |
| Grayslake to Consett | 3,774.40 mi (6,074.31 km) |
| Grayslake to Conwy | 3,747.01 mi (6,030.24 km) |
| Grayslake to Cookstown | 3,600.63 mi (5,794.66 km) |
| Grayslake to Corby | 3,888.21 mi (6,257.47 km) |
| Grayslake to Corfe Mullen | 3,892.99 mi (6,265.16 km) |
| Grayslake to Corsham | 3,865.43 mi (6,220.81 km) |
| Grayslake to Coseley | 3,834.48 mi (6,171.01 km) |
