| Duluth to Cividale del Friuli | 4,599.82 mi (7,402.70 km) |
| Duluth to Civita Castellana | 4,747.29 mi (7,640.03 km) |
| Duluth to Civitanova Marche | 4,745.98 mi (7,637.92 km) |
| Duluth to Civitavecchia | 4,734.54 mi (7,619.50 km) |
| Duluth to Civitella in Val di Chiana | 4,668.07 mi (7,512.54 km) |
| Duluth to Clusone | 4,488.14 mi (7,222.97 km) |
| Duluth to Coccaglio | 4,504.06 mi (7,248.59 km) |
| Duluth to Codigoro | 4,614.53 mi (7,426.37 km) |
| Duluth to Codogno | 4,513.09 mi (7,263.11 km) |
| Duluth to Codroipo | 4,590.73 mi (7,388.07 km) |
| Duluth to Cogoleto | 4,510.56 mi (7,259.04 km) |
| Duluth to Colle di Val d'Elsa | 4,647.76 mi (7,479.84 km) |
| Duluth to Colle Salvetti | 4,614.62 mi (7,426.52 km) |
| Duluth to Collecchio | 4,550.68 mi (7,323.62 km) |
| Duluth to Colleferro | 4,796.80 mi (7,719.70 km) |
