| Howard to Benavente | 3,940.21 mi (6,341.16 km) |
| Howard to Bombarral | 3,912.86 mi (6,297.14 km) |
| Howard to Bougado | 3,862.10 mi (6,215.45 km) |
| Howard to Braga | 3,860.34 mi (6,212.62 km) |
| Howard to Braganca | 3,923.22 mi (6,313.81 km) |
| Howard to Cabeceiras de Basto | 3,878.61 mi (6,242.02 km) |
| Howard to Cacem | 3,924.87 mi (6,316.46 km) |
| Howard to Cadaval | 3,916.65 mi (6,303.24 km) |
| Howard to Caldas da Rainha | 3,908.48 mi (6,290.09 km) |
| Howard to Calheta | 3,792.11 mi (6,102.80 km) |
| Howard to Camara de Lobos | 3,802.28 mi (6,119.18 km) |
| Howard to Canico | 3,810.52 mi (6,132.43 km) |
| Howard to Cantanhede | 3,897.33 mi (6,272.14 km) |
| Howard to Carregal do Sal | 3,920.33 mi (6,309.15 km) |
| Howard to Cartaxo | 3,933.99 mi (6,331.14 km) |
