| Washougal to Cividale del Friuli | 5,554.69 mi (8,939.41 km) |
| Washougal to Civita Castellana | 5,757.44 mi (9,265.70 km) |
| Washougal to Civitanova Marche | 5,730.36 mi (9,222.12 km) |
| Washougal to Civitavecchia | 5,753.44 mi (9,259.27 km) |
| Washougal to Civitella in Val di Chiana | 5,672.87 mi (9,129.60 km) |
| Washougal to Clusone | 5,482.11 mi (8,822.60 km) |
| Washougal to Coccaglio | 5,501.62 mi (8,854.01 km) |
| Washougal to Codigoro | 5,598.54 mi (9,009.98 km) |
| Washougal to Codogno | 5,518.31 mi (8,880.86 km) |
| Washougal to Codroipo | 5,552.10 mi (8,935.25 km) |
| Washougal to Cogoleto | 5,535.76 mi (8,908.94 km) |
| Washougal to Colle di Val d'Elsa | 5,658.91 mi (9,107.14 km) |
| Washougal to Colle Salvetti | 5,630.27 mi (9,061.04 km) |
| Washougal to Collecchio | 5,555.56 mi (8,940.81 km) |
| Washougal to Colleferro | 5,806.66 mi (9,344.92 km) |
