| Clayton to Benavente | 1,075.18 mi (1,730.34 km) |
| Clayton to Bombarral | 1,060.44 mi (1,706.61 km) |
| Clayton to Bougado | 914.57 mi (1,471.86 km) |
| Clayton to Braga | 898.34 mi (1,445.75 km) |
| Clayton to Braganca | 858.13 mi (1,381.03 km) |
| Clayton to Cabeceiras de Basto | 893.34 mi (1,437.69 km) |
| Clayton to Cacem | 1,095.74 mi (1,763.42 km) |
| Clayton to Cadaval | 1,061.90 mi (1,708.96 km) |
| Clayton to Caldas da Rainha | 1,050.93 mi (1,691.31 km) |
| Clayton to Calheta | 1,639.20 mi (2,638.04 km) |
| Clayton to Camara de Lobos | 1,636.92 mi (2,634.37 km) |
| Clayton to Canico | 1,637.53 mi (2,635.35 km) |
| Clayton to Cantanhede | 980.55 mi (1,578.04 km) |
| Clayton to Carregal do Sal | 966.19 mi (1,554.93 km) |
| Clayton to Cartaxo | 1,062.74 mi (1,710.32 km) |
