| Idar-Oberstein to Calne | 425.58 mi (684.90 km) |
| Idar-Oberstein to Cam | 444.80 mi (715.84 km) |
| Idar-Oberstein to Camberley | 370.97 mi (597.01 km) |
| Idar-Oberstein to Camborne | 561.01 mi (902.87 km) |
| Idar-Oberstein to Cambridge | 357.14 mi (574.76 km) |
| Idar-Oberstein to Cambuslang | 637.65 mi (1,026.20 km) |
| Idar-Oberstein to Canford Cliffs | 414.13 mi (666.48 km) |
| Idar-Oberstein to Cannock | 453.28 mi (729.48 km) |
| Idar-Oberstein to Canterbury | 294.50 mi (473.96 km) |
| Idar-Oberstein to Carlisle | 561.07 mi (902.96 km) |
| Idar-Oberstein to Carlton Colville | 308.81 mi (496.98 km) |
| Idar-Oberstein to Carluke | 623.77 mi (1,003.86 km) |
| Idar-Oberstein to Carnoustie | 625.58 mi (1,006.78 km) |
| Idar-Oberstein to Carshalton | 347.62 mi (559.44 km) |
| Idar-Oberstein to Carterton | 413.93 mi (666.15 km) |
