| Clayton to Arcos de Valdevez | 878.79 mi (1,414.27 km) |
| Clayton to Arcozelo | 934.38 mi (1,503.73 km) |
| Clayton to Arganil | 981.29 mi (1,579.24 km) |
| Clayton to Arouca | 936.42 mi (1,507.03 km) |
| Clayton to Arruda dos Vinhos | 1,077.98 mi (1,734.85 km) |
| Clayton to Aveiro | 962.40 mi (1,548.83 km) |
| Clayton to Aver-o-Mar | 913.53 mi (1,470.18 km) |
| Clayton to Aves | 903.76 mi (1,454.47 km) |
| Clayton to Azambuja | 1,069.49 mi (1,721.18 km) |
| Clayton to Baiao | 917.88 mi (1,477.19 km) |
| Clayton to Barcelos | 903.67 mi (1,454.31 km) |
| Clayton to Barreiro | 1,099.02 mi (1,768.70 km) |
| Clayton to Batalha | 1,029.77 mi (1,657.26 km) |
| Clayton to Beja | 1,125.56 mi (1,811.41 km) |
| Clayton to Belas | 1,094.85 mi (1,762.00 km) |
