| Duluth to Benavente | 4,053.53 mi (6,523.52 km) |
| Duluth to Bombarral | 4,025.78 mi (6,478.86 km) |
| Duluth to Bougado | 3,965.93 mi (6,382.55 km) |
| Duluth to Braga | 3,963.07 mi (6,377.94 km) |
| Duluth to Braganca | 4,021.65 mi (6,472.22 km) |
| Duluth to Cabeceiras de Basto | 3,980.60 mi (6,406.16 km) |
| Duluth to Cacem | 4,039.94 mi (6,501.66 km) |
| Duluth to Cadaval | 4,029.59 mi (6,484.99 km) |
| Duluth to Caldas da Rainha | 4,020.84 mi (6,470.91 km) |
| Duluth to Calheta | 3,944.58 mi (6,348.18 km) |
| Duluth to Camara de Lobos | 3,954.47 mi (6,364.10 km) |
| Duluth to Canico | 3,962.62 mi (6,377.22 km) |
| Duluth to Cantanhede | 4,005.04 mi (6,445.49 km) |
| Duluth to Carregal do Sal | 4,026.51 mi (6,480.05 km) |
| Duluth to Cartaxo | 4,046.59 mi (6,512.35 km) |
