| Niagara Falls to Cividale del Friuli | 4,278.58 mi (6,885.70 km) |
| Niagara Falls to Civita Castellana | 4,386.89 mi (7,060.01 km) |
| Niagara Falls to Civitanova Marche | 4,401.33 mi (7,083.25 km) |
| Niagara Falls to Civitavecchia | 4,369.20 mi (7,031.55 km) |
| Niagara Falls to Civitella in Val di Chiana | 4,313.76 mi (6,942.32 km) |
| Niagara Falls to Clusone | 4,147.19 mi (6,674.26 km) |
| Niagara Falls to Coccaglio | 4,160.27 mi (6,695.30 km) |
| Niagara Falls to Codigoro | 4,274.94 mi (6,879.85 km) |
| Niagara Falls to Codogno | 4,164.18 mi (6,701.61 km) |
| Niagara Falls to Codroipo | 4,265.88 mi (6,865.26 km) |
| Niagara Falls to Cogoleto | 4,149.25 mi (6,677.58 km) |
| Niagara Falls to Colle di Val d'Elsa | 4,290.25 mi (6,904.49 km) |
| Niagara Falls to Colle Salvetti | 4,255.52 mi (6,848.60 km) |
| Niagara Falls to Collecchio | 4,200.60 mi (6,760.21 km) |
| Niagara Falls to Colleferro | 4,434.84 mi (7,137.19 km) |
