| Harrow to Cividale del Friuli | 730.50 mi (1,175.63 km) |
| Harrow to Civita Castellana | 877.27 mi (1,411.83 km) |
| Harrow to Civitanova Marche | 869.40 mi (1,399.16 km) |
| Harrow to Civitavecchia | 868.85 mi (1,398.29 km) |
| Harrow to Civitella in Val di Chiana | 795.23 mi (1,279.79 km) |
| Harrow to Clusone | 611.61 mi (984.29 km) |
| Harrow to Coccaglio | 628.08 mi (1,010.79 km) |
| Harrow to Codigoro | 737.78 mi (1,187.34 km) |
| Harrow to Codogno | 639.10 mi (1,028.53 km) |
| Harrow to Codroipo | 718.78 mi (1,156.76 km) |
| Harrow to Cogoleto | 647.11 mi (1,041.42 km) |
| Harrow to Colle di Val d'Elsa | 777.30 mi (1,250.94 km) |
| Harrow to Colle Salvetti | 746.07 mi (1,200.69 km) |
| Harrow to Collecchio | 676.89 mi (1,089.35 km) |
| Harrow to Colleferro | 927.09 mi (1,492.00 km) |
