| Duffel to Cicero (Illinois) | 4,142.87 mi (6,667.31 km) |
| Duffel to Cimarron Hills (Colorado) | 4,898.20 mi (7,882.89 km) |
| Duffel to Cincinnati (Ohio) | 4,147.60 mi (6,674.92 km) |
| Duffel to Cinco Ranch (Texas) | 5,058.70 mi (8,141.20 km) |
| Duffel to Circleville (Ohio) | 4,064.38 mi (6,540.99 km) |
| Duffel to Citrus (California) | 5,590.78 mi (8,997.49 km) |
| Duffel to Citrus Heights (California) | 5,422.06 mi (8,725.96 km) |
| Duffel to Citrus Park (Florida) | 4,613.16 mi (7,424.17 km) |
| Duffel to Claiborne (Louisiana) | 4,774.58 mi (7,683.94 km) |
| Duffel to Claremont (California) | 5,584.86 mi (8,987.96 km) |
| Duffel to Claremont (New Hampshire) | 3,477.68 mi (5,596.79 km) |
| Duffel to Claremore (Oklahoma) | 4,709.78 mi (7,579.66 km) |
| Duffel to Clarksburg (Maryland) | 3,857.42 mi (6,207.92 km) |
| Duffel to Clarksburg (West Virginia) | 3,976.65 mi (6,399.80 km) |
| Duffel to Clarksdale (Mississippi) | 4,626.74 mi (7,446.02 km) |
