| Duluth to Carrollwood (Florida) | 1,394.42 mi (2,244.10 km) |
| Duluth to Carson (California) | 1,628.93 mi (2,621.51 km) |
| Duluth to Carson City (Nevada) | 1,482.60 mi (2,386.01 km) |
| Duluth to Carteret (New Jersey) | 988.90 mi (1,591.48 km) |
| Duluth to Cartersville (Georgia) | 951.86 mi (1,531.86 km) |
| Duluth to Carthage (Missouri) | 674.36 mi (1,085.28 km) |
| Duluth to Cary (Illinois) | 368.86 mi (593.62 km) |
| Duluth to Cary (North Carolina) | 1,024.45 mi (1,648.70 km) |
| Duluth to Casa de Oro-Mount Helix (California) | 1,624.18 mi (2,613.86 km) |
| Duluth to Casa Grande (Arizona) | 1,407.55 mi (2,265.23 km) |
| Duluth to Casas Adobes (Arizona) | 1,408.91 mi (2,267.42 km) |
| Duluth to Cascades (Virginia) | 915.43 mi (1,473.24 km) |
| Duluth to Casper (Wyoming) | 745.08 mi (1,199.09 km) |
| Duluth to Casselberry (Florida) | 1,381.02 mi (2,222.54 km) |
| Duluth to Castaic (California) | 1,616.44 mi (2,601.40 km) |
