| Rockville to Cascais | 3,552.41 mi (5,717.05 km) |
| Rockville to Castelo Branco | 3,616.29 mi (5,819.86 km) |
| Rockville to Castro Daire | 3,566.37 mi (5,739.53 km) |
| Rockville to Celorico de Basto | 3,550.64 mi (5,714.20 km) |
| Rockville to Chamusca | 3,580.81 mi (5,762.76 km) |
| Rockville to Chaves | 3,566.84 mi (5,740.28 km) |
| Rockville to Cinfaes | 3,551.51 mi (5,715.61 km) |
| Rockville to Coimbra | 3,560.40 mi (5,729.91 km) |
| Rockville to Condeixa-a-Nova | 3,559.44 mi (5,728.37 km) |
| Rockville to Corroios | 3,567.92 mi (5,742.01 km) |
| Rockville to Coruche | 3,589.38 mi (5,776.55 km) |
| Rockville to Costa de Caparica | 3,562.90 mi (5,733.93 km) |
| Rockville to Covilha | 3,603.69 mi (5,799.59 km) |
| Rockville to Eiras | 3,559.83 mi (5,729.00 km) |
| Rockville to Elvas | 3,659.68 mi (5,889.69 km) |
