| Harrow to Collegno | 577.58 mi (929.52 km) |
| Harrow to Cologno al Serio | 617.65 mi (994.02 km) |
| Harrow to Cologno Monzese | 606.33 mi (975.79 km) |
| Harrow to Colorno | 673.08 mi (1,083.22 km) |
| Harrow to Comacchio | 746.51 mi (1,201.40 km) |
| Harrow to Comiso | 1,247.46 mi (2,007.60 km) |
| Harrow to Como | 585.80 mi (942.75 km) |
| Harrow to Concordia Sagittaria | 722.22 mi (1,162.30 km) |
| Harrow to Concorezzo | 605.15 mi (973.90 km) |
| Harrow to Conegliano | 696.28 mi (1,120.56 km) |
| Harrow to Conselice | 743.18 mi (1,196.04 km) |
| Harrow to Conselve | 709.99 mi (1,142.61 km) |
| Harrow to Conversano | 1,105.57 mi (1,779.25 km) |
| Harrow to Copertino | 1,174.29 mi (1,889.84 km) |
| Harrow to Copparo | 724.57 mi (1,166.08 km) |
