| Ronciglione to Colchester | 848.45 mi (1,365.44 km) |
| Ronciglione to Coleford | 955.09 mi (1,537.07 km) |
| Ronciglione to Colne | 1,035.19 mi (1,665.98 km) |
| Ronciglione to Colwyn Bay | 1,055.35 mi (1,698.41 km) |
| Ronciglione to Congleton | 1,003.34 mi (1,614.71 km) |
| Ronciglione to Conisbrough | 989.39 mi (1,592.28 km) |
| Ronciglione to Connahs Quay | 1,031.85 mi (1,660.60 km) |
| Ronciglione to Consett | 1,075.31 mi (1,730.55 km) |
| Ronciglione to Conwy | 1,059.05 mi (1,704.38 km) |
| Ronciglione to Cookstown | 1,210.55 mi (1,948.20 km) |
| Ronciglione to Corby | 925.38 mi (1,489.25 km) |
| Ronciglione to Corfe Mullen | 892.28 mi (1,435.98 km) |
| Ronciglione to Corsham | 925.40 mi (1,489.28 km) |
| Ronciglione to Coseley | 970.91 mi (1,562.54 km) |
| Ronciglione to Cosham | 862.02 mi (1,387.28 km) |
