| Idar-Oberstein to Clarkston (Georgia) | 4,546.42 mi (7,316.75 km) |
| Idar-Oberstein to Clarksville (Indiana) | 4,389.48 mi (7,064.18 km) |
| Idar-Oberstein to Clarksville (Tennessee) | 4,535.90 mi (7,299.82 km) |
| Idar-Oberstein to Clawson (Michigan) | 4,091.24 mi (6,584.22 km) |
| Idar-Oberstein to Clay (Alabama) | 4,647.95 mi (7,480.15 km) |
| Idar-Oberstein to Clayton (California) | 5,636.81 mi (9,071.57 km) |
| Idar-Oberstein to Clayton (Missouri) | 4,549.56 mi (7,321.81 km) |
| Idar-Oberstein to Clayton (North Carolina) | 4,220.62 mi (6,792.44 km) |
| Idar-Oberstein to Clayton (Ohio) | 4,260.06 mi (6,855.91 km) |
| Idar-Oberstein to Clearfield (Utah) | 5,165.90 mi (8,313.72 km) |
| Idar-Oberstein to Clearlake (California) | 5,595.21 mi (9,004.61 km) |
| Idar-Oberstein to Clearwater (Florida) | 4,772.76 mi (7,681.01 km) |
| Idar-Oberstein to Cleburne (Texas) | 5,138.69 mi (8,269.93 km) |
| Idar-Oberstein to Clemmons (North Carolina) | 4,282.77 mi (6,892.45 km) |
| Idar-Oberstein to Clemson (South Carolina) | 4,446.03 mi (7,155.19 km) |
