| Dumbarton to Cividale del Friuli | 1,031.32 mi (1,659.76 km) |
| Dumbarton to Civita Castellana | 1,209.46 mi (1,946.44 km) |
| Dumbarton to Civitanova Marche | 1,190.56 mi (1,916.02 km) |
| Dumbarton to Civitavecchia | 1,204.20 mi (1,937.97 km) |
| Dumbarton to Civitella in Val di Chiana | 1,125.51 mi (1,811.34 km) |
| Dumbarton to Clusone | 936.29 mi (1,506.81 km) |
| Dumbarton to Coccaglio | 954.89 mi (1,536.75 km) |
| Dumbarton to Codigoro | 1,057.66 mi (1,702.13 km) |
| Dumbarton to Codogno | 969.93 mi (1,560.95 km) |
| Dumbarton to Codroipo | 1,023.91 mi (1,647.82 km) |
| Dumbarton to Cogoleto | 986.34 mi (1,587.36 km) |
| Dumbarton to Colle di Val d'Elsa | 1,110.26 mi (1,786.79 km) |
| Dumbarton to Colle Salvetti | 1,080.96 mi (1,739.64 km) |
| Dumbarton to Collecchio | 1,007.46 mi (1,621.35 km) |
| Dumbarton to Colleferro | 1,259.02 mi (2,026.20 km) |
