| Ashburn to Cascais | 3,569.55 mi (5,744.64 km) |
| Ashburn to Castelo Branco | 3,633.31 mi (5,847.25 km) |
| Ashburn to Castro Daire | 3,583.32 mi (5,766.80 km) |
| Ashburn to Celorico de Basto | 3,567.55 mi (5,741.42 km) |
| Ashburn to Chamusca | 3,597.89 mi (5,790.24 km) |
| Ashburn to Chaves | 3,583.71 mi (5,767.43 km) |
| Ashburn to Cinfaes | 3,568.45 mi (5,742.87 km) |
| Ashburn to Coimbra | 3,577.41 mi (5,757.29 km) |
| Ashburn to Condeixa-a-Nova | 3,576.47 mi (5,755.77 km) |
| Ashburn to Corroios | 3,585.06 mi (5,769.59 km) |
| Ashburn to Coruche | 3,606.49 mi (5,804.08 km) |
| Ashburn to Costa de Caparica | 3,580.04 mi (5,761.51 km) |
| Ashburn to Covilha | 3,620.68 mi (5,826.92 km) |
| Ashburn to Eiras | 3,576.85 mi (5,756.38 km) |
| Ashburn to Elvas | 3,676.76 mi (5,917.17 km) |
