| Half Moon Bay to Cividale del Friuli | 6,046.92 mi (9,731.57 km) |
| Half Moon Bay to Civita Castellana | 6,236.77 mi (10,037.12 km) |
| Half Moon Bay to Civitanova Marche | 6,216.45 mi (10,004.40 km) |
| Half Moon Bay to Civitavecchia | 6,230.28 mi (10,026.67 km) |
| Half Moon Bay to Civitella in Val di Chiana | 6,153.07 mi (9,902.41 km) |
| Half Moon Bay to Clusone | 5,963.83 mi (9,597.86 km) |
| Half Moon Bay to Coccaglio | 5,982.53 mi (9,627.95 km) |
| Half Moon Bay to Codigoro | 6,083.76 mi (9,790.86 km) |
| Half Moon Bay to Codogno | 5,997.26 mi (9,651.66 km) |
| Half Moon Bay to Codroipo | 6,042.72 mi (9,724.82 km) |
| Half Moon Bay to Cogoleto | 6,009.22 mi (9,670.90 km) |
| Half Moon Bay to Colle di Val d'Elsa | 6,137.26 mi (9,876.96 km) |
| Half Moon Bay to Colle Salvetti | 6,107.14 mi (9,828.50 km) |
| Half Moon Bay to Collecchio | 6,034.88 mi (9,712.20 km) |
| Half Moon Bay to Colleferro | 6,286.43 mi (10,117.03 km) |
