| Niagara Falls to Cernavoda | 4,910.78 mi (7,903.13 km) |
| Niagara Falls to Chitila | 4,827.54 mi (7,769.17 km) |
| Niagara Falls to Cisnadie | 4,705.59 mi (7,572.91 km) |
| Niagara Falls to Cluj-Napoca | 4,638.24 mi (7,464.52 km) |
| Niagara Falls to Codlea | 4,753.87 mi (7,650.61 km) |
| Niagara Falls to Comanesti | 4,757.25 mi (7,656.05 km) |
| Niagara Falls to Comarnic | 4,781.01 mi (7,694.29 km) |
| Niagara Falls to Constanta | 4,940.64 mi (7,951.19 km) |
| Niagara Falls to Corabia | 4,805.53 mi (7,733.75 km) |
| Niagara Falls to Costesti | 4,779.29 mi (7,691.53 km) |
| Niagara Falls to Covasna | 4,774.01 mi (7,683.03 km) |
| Niagara Falls to Craiova | 4,754.49 mi (7,651.61 km) |
| Niagara Falls to Cristuru Secuiesc | 4,712.27 mi (7,583.67 km) |
| Niagara Falls to Cugir | 4,670.64 mi (7,516.67 km) |
| Niagara Falls to Cumpana | 4,940.35 mi (7,950.72 km) |
