| Horley to Cividale del Friuli | 711.72 mi (1,145.40 km) |
| Horley to Civita Castellana | 852.87 mi (1,372.56 km) |
| Horley to Civitanova Marche | 846.97 mi (1,363.07 km) |
| Horley to Civitavecchia | 843.85 mi (1,358.04 km) |
| Horley to Civitella in Val di Chiana | 771.29 mi (1,241.28 km) |
| Horley to Clusone | 589.14 mi (948.13 km) |
| Horley to Coccaglio | 605.15 mi (973.89 km) |
| Horley to Codigoro | 715.84 mi (1,152.04 km) |
| Horley to Codogno | 615.34 mi (990.29 km) |
| Horley to Codroipo | 699.36 mi (1,125.50 km) |
| Horley to Cogoleto | 621.50 mi (1,000.21 km) |
| Horley to Colle di Val d'Elsa | 752.87 mi (1,211.63 km) |
| Horley to Colle Salvetti | 721.30 mi (1,160.82 km) |
| Horley to Collecchio | 653.10 mi (1,051.07 km) |
| Horley to Colleferro | 902.68 mi (1,452.73 km) |
