| Idar-Oberstein to Cicero (Illinois) | 4,298.08 mi (6,917.10 km) |
| Idar-Oberstein to Cimarron Hills (Colorado) | 5,054.19 mi (8,133.93 km) |
| Idar-Oberstein to Cincinnati (Ohio) | 4,301.20 mi (6,922.11 km) |
| Idar-Oberstein to Cinco Ranch (Texas) | 5,212.44 mi (8,388.61 km) |
| Idar-Oberstein to Circleville (Ohio) | 4,217.69 mi (6,787.72 km) |
| Idar-Oberstein to Citrus (California) | 5,745.32 mi (9,246.20 km) |
| Idar-Oberstein to Citrus Heights (California) | 5,574.22 mi (8,970.85 km) |
| Idar-Oberstein to Citrus Park (Florida) | 4,759.64 mi (7,659.91 km) |
| Idar-Oberstein to Claiborne (Louisiana) | 4,928.09 mi (7,931.00 km) |
| Idar-Oberstein to Claremont (California) | 5,739.44 mi (9,236.74 km) |
| Idar-Oberstein to Claremont (New Hampshire) | 3,629.47 mi (5,841.07 km) |
| Idar-Oberstein to Claremore (Oklahoma) | 4,865.15 mi (7,829.70 km) |
| Idar-Oberstein to Clarksburg (Maryland) | 4,008.49 mi (6,451.04 km) |
| Idar-Oberstein to Clarksburg (West Virginia) | 4,128.94 mi (6,644.88 km) |
| Idar-Oberstein to Clarksdale (Mississippi) | 4,780.31 mi (7,693.17 km) |
