| Idar-Oberstein to Cookeville (Tennessee) | 4,484.02 mi (7,216.34 km) |
| Idar-Oberstein to Coolidge (Arizona) | 5,610.45 mi (9,029.15 km) |
| Idar-Oberstein to Coon Rapids (Minnesota) | 4,339.49 mi (6,983.74 km) |
| Idar-Oberstein to Cooper City (Florida) | 4,763.58 mi (7,666.24 km) |
| Idar-Oberstein to Coos Bay (Oregon) | 5,371.94 mi (8,645.30 km) |
| Idar-Oberstein to Copiague (New York) | 3,786.77 mi (6,094.22 km) |
| Idar-Oberstein to Coppell (Texas) | 5,090.77 mi (8,192.80 km) |
| Idar-Oberstein to Copperas Cove (Texas) | 5,222.87 mi (8,405.40 km) |
| Idar-Oberstein to Coral Gables (Florida) | 4,780.04 mi (7,692.73 km) |
| Idar-Oberstein to Coral Springs (Florida) | 4,751.26 mi (7,646.41 km) |
| Idar-Oberstein to Coral Terrace (Florida) | 4,779.35 mi (7,691.62 km) |
| Idar-Oberstein to Coralville (Iowa) | 4,447.14 mi (7,156.98 km) |
| Idar-Oberstein to Coram (New York) | 3,761.90 mi (6,054.20 km) |
| Idar-Oberstein to Corcoran (California) | 5,679.60 mi (9,140.43 km) |
| Idar-Oberstein to Cordele (Georgia) | 4,617.93 mi (7,431.84 km) |
