| Duluth to Cadillac (Michigan) | 369.17 mi (594.13 km) |
| Duluth to Caguas (Puerto Rico) | 2,466.38 mi (3,969.26 km) |
| Duluth to Cahokia (Illinois) | 575.92 mi (926.85 km) |
| Duluth to Calabasas (California) | 1,633.35 mi (2,628.63 km) |
| Duluth to Caldwell (Idaho) | 1,207.85 mi (1,943.85 km) |
| Duluth to Caledonia (Wisconsin) | 345.15 mi (555.47 km) |
| Duluth to Calera (Alabama) | 984.84 mi (1,584.95 km) |
| Duluth to Calexico (California) | 1,566.93 mi (2,521.72 km) |
| Duluth to Calhoun (Georgia) | 927.98 mi (1,493.44 km) |
| Duluth to California (Maryland) | 985.73 mi (1,586.39 km) |
| Duluth to California City (California) | 1,553.51 mi (2,500.13 km) |
| Duluth to Callaway (Florida) | 1,202.56 mi (1,935.33 km) |
| Duluth to Calumet City (Illinois) | 422.78 mi (680.40 km) |
| Duluth to Calverton (Maryland) | 932.92 mi (1,501.39 km) |
| Duluth to Camano (Washington) | 1,410.47 mi (2,269.94 km) |
