| Boston to Cascais | 1,082.84 mi (1,742.66 km) |
| Boston to Castelo Branco | 975.15 mi (1,569.36 km) |
| Boston to Castro Daire | 912.61 mi (1,468.70 km) |
| Boston to Celorico de Basto | 882.88 mi (1,420.85 km) |
| Boston to Chamusca | 1,023.05 mi (1,646.44 km) |
| Boston to Chaves | 849.79 mi (1,367.60 km) |
| Boston to Cinfaes | 903.62 mi (1,454.23 km) |
| Boston to Coimbra | 966.41 mi (1,555.29 km) |
| Boston to Condeixa-a-Nova | 973.85 mi (1,567.26 km) |
| Boston to Corroios | 1,083.19 mi (1,743.23 km) |
| Boston to Coruche | 1,049.36 mi (1,688.78 km) |
| Boston to Costa de Caparica | 1,082.89 mi (1,742.74 km) |
| Boston to Covilha | 944.68 mi (1,520.32 km) |
| Boston to Eiras | 964.32 mi (1,551.92 km) |
| Boston to Elvas | 1,031.94 mi (1,660.75 km) |
