| Duncan to Cividale del Friuli | 5,419.01 mi (8,721.05 km) |
| Duncan to Civita Castellana | 5,542.66 mi (8,920.05 km) |
| Duncan to Civitanova Marche | 5,551.62 mi (8,934.46 km) |
| Duncan to Civitavecchia | 5,526.51 mi (8,894.06 km) |
| Duncan to Civitella in Val di Chiana | 5,467.25 mi (8,798.69 km) |
| Duncan to Clusone | 5,295.24 mi (8,521.86 km) |
| Duncan to Coccaglio | 5,309.44 mi (8,544.72 km) |
| Duncan to Codigoro | 5,422.89 mi (8,727.30 km) |
| Duncan to Codogno | 5,315.27 mi (8,554.10 km) |
| Duncan to Codroipo | 5,407.81 mi (8,703.03 km) |
| Duncan to Cogoleto | 5,304.61 mi (8,536.95 km) |
| Duncan to Colle di Val d'Elsa | 5,444.77 mi (8,762.50 km) |
| Duncan to Colle Salvetti | 5,410.47 mi (8,707.31 km) |
| Duncan to Collecchio | 5,352.23 mi (8,613.58 km) |
| Duncan to Colleferro | 5,591.26 mi (8,998.27 km) |
