| Duncan to Corato | 5,751.59 mi (9,256.29 km) |
| Duncan to Corbetta | 5,271.83 mi (8,484.19 km) |
| Duncan to Corciano | 5,501.76 mi (8,854.23 km) |
| Duncan to Cordenons | 5,396.37 mi (8,684.62 km) |
| Duncan to Cori | 5,590.92 mi (8,997.72 km) |
| Duncan to Coriano | 5,478.59 mi (8,816.93 km) |
| Duncan to Corigliano Calabro | 5,826.49 mi (9,376.83 km) |
| Duncan to Corleone | 5,773.69 mi (9,291.85 km) |
| Duncan to Cormano | 5,278.28 mi (8,494.56 km) |
| Duncan to Cornaredo | 5,275.07 mi (8,489.40 km) |
| Duncan to Cornate d'Adda | 5,285.95 mi (8,506.92 km) |
| Duncan to Cornedo Vicentino | 5,360.33 mi (8,626.62 km) |
| Duncan to Correggio | 5,373.59 mi (8,647.95 km) |
| Duncan to Corridonia | 5,545.32 mi (8,924.33 km) |
| Duncan to Corsico | 5,281.04 mi (8,499.01 km) |
