| Idar-Oberstein to Corinth (Mississippi) | 4,661.87 mi (7,502.56 km) |
| Idar-Oberstein to Corinth (Texas) | 5,084.32 mi (8,182.42 km) |
| Idar-Oberstein to Cornelius (North Carolina) | 4,329.46 mi (6,967.60 km) |
| Idar-Oberstein to Cornelius (Oregon) | 5,214.81 mi (8,392.42 km) |
| Idar-Oberstein to Corning (New York) | 3,870.60 mi (6,229.13 km) |
| Idar-Oberstein to Corona (California) | 5,750.28 mi (9,254.19 km) |
| Idar-Oberstein to Coronado (California) | 5,807.63 mi (9,346.48 km) |
| Idar-Oberstein to Corpus Christi (Texas) | 5,381.92 mi (8,661.37 km) |
| Idar-Oberstein to Corsicana (Texas) | 5,116.97 mi (8,234.96 km) |
| Idar-Oberstein to Cortland (New York) | 3,816.06 mi (6,141.35 km) |
| Idar-Oberstein to Corvallis (Oregon) | 5,276.94 mi (8,492.41 km) |
| Idar-Oberstein to Coshocton (Ohio) | 4,144.66 mi (6,670.18 km) |
| Idar-Oberstein to Costa Mesa (California) | 5,772.35 mi (9,289.70 km) |
| Idar-Oberstein to Coto de Caza (California) | 5,766.45 mi (9,280.21 km) |
| Idar-Oberstein to Cottage Grove (Minnesota) | 4,343.52 mi (6,990.22 km) |
