| Harrow Weald to Cividale del Friuli | 730.83 mi (1,176.16 km) |
| Harrow Weald to Civita Castellana | 877.98 mi (1,412.97 km) |
| Harrow Weald to Civitanova Marche | 869.96 mi (1,400.07 km) |
| Harrow Weald to Civitavecchia | 869.61 mi (1,399.50 km) |
| Harrow Weald to Civitella in Val di Chiana | 795.90 mi (1,280.88 km) |
| Harrow Weald to Clusone | 612.18 mi (985.21 km) |
| Harrow Weald to Coccaglio | 628.68 mi (1,011.77 km) |
| Harrow Weald to Codigoro | 738.31 mi (1,188.20 km) |
| Harrow Weald to Codogno | 639.76 mi (1,029.60 km) |
| Harrow Weald to Codroipo | 719.15 mi (1,157.36 km) |
| Harrow Weald to Cogoleto | 647.92 mi (1,042.72 km) |
| Harrow Weald to Colle di Val d'Elsa | 778.01 mi (1,252.08 km) |
| Harrow Weald to Colle Salvetti | 746.81 mi (1,201.88 km) |
| Harrow Weald to Collecchio | 677.55 mi (1,090.42 km) |
| Harrow Weald to Colleferro | 927.80 mi (1,493.14 km) |
