| Mercer Island to Cividale del Friuli | 5,432.75 mi (8,743.17 km) |
| Mercer Island to Civita Castellana | 5,638.40 mi (9,074.13 km) |
| Mercer Island to Civitanova Marche | 5,609.75 mi (9,028.02 km) |
| Mercer Island to Civitavecchia | 5,634.99 mi (9,068.65 km) |
| Mercer Island to Civitella in Val di Chiana | 5,553.69 mi (8,937.80 km) |
| Mercer Island to Clusone | 5,362.72 mi (8,630.46 km) |
| Mercer Island to Coccaglio | 5,382.41 mi (8,662.16 km) |
| Mercer Island to Codigoro | 5,478.23 mi (8,816.36 km) |
| Mercer Island to Codogno | 5,399.56 mi (8,689.75 km) |
| Mercer Island to Codroipo | 5,430.55 mi (8,739.63 km) |
| Mercer Island to Cogoleto | 5,418.30 mi (8,719.90 km) |
| Mercer Island to Colle di Val d'Elsa | 5,540.19 mi (8,916.07 km) |
| Mercer Island to Colle Salvetti | 5,511.92 mi (8,870.57 km) |
| Mercer Island to Collecchio | 5,436.69 mi (8,749.50 km) |
| Mercer Island to Colleferro | 5,687.48 mi (9,153.12 km) |
