| Duffel to Clarkston (Georgia) | 4,395.45 mi (7,073.79 km) |
| Duffel to Clarksville (Indiana) | 4,235.84 mi (6,816.92 km) |
| Duffel to Clarksville (Tennessee) | 4,382.46 mi (7,052.89 km) |
| Duffel to Clawson (Michigan) | 3,936.73 mi (6,335.55 km) |
| Duffel to Clay (Alabama) | 4,496.02 mi (7,235.64 km) |
| Duffel to Clayton (California) | 5,484.67 mi (8,826.72 km) |
| Duffel to Clayton (Missouri) | 4,394.67 mi (7,072.54 km) |
| Duffel to Clayton (North Carolina) | 4,071.32 mi (6,552.15 km) |
| Duffel to Clayton (Ohio) | 4,106.23 mi (6,608.34 km) |
| Duffel to Clearfield (Utah) | 5,011.39 mi (8,065.05 km) |
| Duffel to Clearlake (California) | 5,443.70 mi (8,760.79 km) |
| Duffel to Clearwater (Florida) | 4,626.21 mi (7,445.17 km) |
| Duffel to Cleburne (Texas) | 4,983.79 mi (8,020.63 km) |
| Duffel to Clemmons (North Carolina) | 4,132.29 mi (6,650.28 km) |
| Duffel to Clemson (South Carolina) | 4,295.22 mi (6,912.49 km) |
