| Boston to Campo de Criptana | 949.26 mi (1,527.68 km) |
| Boston to Campos del Puerto | 946.77 mi (1,523.67 km) |
| Boston to Canals | 968.57 mi (1,558.76 km) |
| Boston to Candelaria | 1,894.44 mi (3,048.80 km) |
| Boston to Canet de Mar | 795.76 mi (1,280.65 km) |
| Boston to Cangas | 843.57 mi (1,357.60 km) |
| Boston to Cangas de Narcea | 740.38 mi (1,191.53 km) |
| Boston to Canovellas | 791.93 mi (1,274.48 km) |
| Boston to Canteras | 1,062.53 mi (1,709.98 km) |
| Boston to Cantillana | 1,098.06 mi (1,767.16 km) |
| Boston to Capdepera | 931.55 mi (1,499.18 km) |
| Boston to Carballo | 782.48 mi (1,259.28 km) |
| Boston to Carcagente | 957.28 mi (1,540.60 km) |
| Boston to Cardedeu | 790.85 mi (1,272.75 km) |
| Boston to Carlet | 950.16 mi (1,529.14 km) |
