| Mason City to Caldicot | 3,996.14 mi (6,431.16 km) |
| Mason City to Calne | 4,029.04 mi (6,484.12 km) |
| Mason City to Cam | 4,006.48 mi (6,447.81 km) |
| Mason City to Camberley | 4,079.24 mi (6,564.90 km) |
| Mason City to Camborne | 3,947.77 mi (6,353.32 km) |
| Mason City to Cambridge | 4,078.82 mi (6,564.23 km) |
| Mason City to Cambuslang | 3,804.45 mi (6,122.66 km) |
| Mason City to Canford Cliffs | 4,058.25 mi (6,531.12 km) |
| Mason City to Cannock | 3,984.10 mi (6,411.79 km) |
| Mason City to Canterbury | 4,147.76 mi (6,675.18 km) |
| Mason City to Carlisle | 3,876.86 mi (6,239.20 km) |
| Mason City to Carlton Colville | 4,125.77 mi (6,639.79 km) |
| Mason City to Carluke | 3,818.64 mi (6,145.51 km) |
| Mason City to Carnoustie | 3,832.52 mi (6,167.85 km) |
| Mason City to Carshalton | 4,099.16 mi (6,596.97 km) |
