| Mercer Island to Cernavoda | 5,834.71 mi (9,390.06 km) |
| Mercer Island to Chitila | 5,788.56 mi (9,315.79 km) |
| Mercer Island to Cisnadie | 5,678.36 mi (9,138.44 km) |
| Mercer Island to Cluj-Napoca | 5,600.71 mi (9,013.46 km) |
| Mercer Island to Codlea | 5,702.50 mi (9,177.29 km) |
| Mercer Island to Comanesti | 5,672.56 mi (9,129.10 km) |
| Mercer Island to Comarnic | 5,734.57 mi (9,228.90 km) |
| Mercer Island to Constanta | 5,855.76 mi (9,423.94 km) |
| Mercer Island to Corabia | 5,809.08 mi (9,348.80 km) |
| Mercer Island to Costesti | 5,758.48 mi (9,267.37 km) |
| Mercer Island to Covasna | 5,705.55 mi (9,182.20 km) |
| Mercer Island to Craiova | 5,760.43 mi (9,270.51 km) |
| Mercer Island to Cristuru Secuiesc | 5,657.08 mi (9,104.18 km) |
| Mercer Island to Cugir | 5,655.55 mi (9,101.73 km) |
| Mercer Island to Cumpana | 5,858.01 mi (9,427.55 km) |
