| Duncan to Cascais | 4,712.53 mi (7,584.08 km) |
| Duncan to Castelo Branco | 4,767.26 mi (7,672.16 km) |
| Duncan to Castro Daire | 4,712.19 mi (7,583.54 km) |
| Duncan to Celorico de Basto | 4,693.75 mi (7,553.86 km) |
| Duncan to Chamusca | 4,736.08 mi (7,621.99 km) |
| Duncan to Chaves | 4,706.68 mi (7,574.68 km) |
| Duncan to Cinfaes | 4,696.57 mi (7,558.40 km) |
| Duncan to Coimbra | 4,711.05 mi (7,581.71 km) |
| Duncan to Condeixa-a-Nova | 4,710.75 mi (7,581.21 km) |
| Duncan to Corroios | 4,727.97 mi (7,608.94 km) |
| Duncan to Coruche | 4,746.69 mi (7,639.05 km) |
| Duncan to Costa de Caparica | 4,722.96 mi (7,600.87 km) |
| Duncan to Covilha | 4,752.12 mi (7,647.81 km) |
| Duncan to Eiras | 4,710.31 mi (7,580.51 km) |
| Duncan to Elvas | 4,814.86 mi (7,748.77 km) |
