| Silver Spring to Cascais | 3,547.87 mi (5,709.74 km) |
| Silver Spring to Castelo Branco | 3,612.03 mi (5,813.01 km) |
| Silver Spring to Castro Daire | 3,562.27 mi (5,732.92 km) |
| Silver Spring to Celorico de Basto | 3,546.62 mi (5,707.73 km) |
| Silver Spring to Chamusca | 3,576.42 mi (5,755.70 km) |
| Silver Spring to Chaves | 3,562.91 mi (5,733.95 km) |
| Silver Spring to Cinfaes | 3,547.44 mi (5,709.05 km) |
| Silver Spring to Coimbra | 3,556.16 mi (5,723.08 km) |
| Silver Spring to Condeixa-a-Nova | 3,555.18 mi (5,721.51 km) |
| Silver Spring to Corroios | 3,563.38 mi (5,734.70 km) |
| Silver Spring to Coruche | 3,584.93 mi (5,769.38 km) |
| Silver Spring to Costa de Caparica | 3,558.36 mi (5,726.62 km) |
| Silver Spring to Covilha | 3,599.51 mi (5,792.86 km) |
| Silver Spring to Eiras | 3,555.60 mi (5,722.18 km) |
| Silver Spring to Elvas | 3,655.29 mi (5,882.62 km) |
