| Mason City to Cernavoda | 5,391.38 mi (8,676.58 km) |
| Mason City to Chitila | 5,317.02 mi (8,556.91 km) |
| Mason City to Cisnadie | 5,195.54 mi (8,361.41 km) |
| Mason City to Cluj-Napoca | 5,123.45 mi (8,245.40 km) |
| Mason City to Codlea | 5,237.87 mi (8,429.54 km) |
| Mason City to Comanesti | 5,231.43 mi (8,419.17 km) |
| Mason City to Comarnic | 5,267.15 mi (8,476.65 km) |
| Mason City to Constanta | 5,419.38 mi (8,721.64 km) |
| Mason City to Corabia | 5,306.92 mi (8,540.66 km) |
| Mason City to Costesti | 5,272.93 mi (8,485.97 km) |
| Mason City to Covasna | 5,253.45 mi (8,454.61 km) |
| Mason City to Craiova | 5,255.37 mi (8,457.69 km) |
| Mason City to Cristuru Secuiesc | 5,194.10 mi (8,359.09 km) |
| Mason City to Cugir | 5,163.31 mi (8,309.55 km) |
| Mason City to Cumpana | 5,419.83 mi (8,722.37 km) |
