| Clayton to Alenquer | 1,072.81 mi (1,726.52 km) |
| Clayton to Alfena | 920.56 mi (1,481.49 km) |
| Clayton to Alijo | 902.82 mi (1,452.95 km) |
| Clayton to Aljustrel | 1,136.90 mi (1,829.67 km) |
| Clayton to Almada | 1,099.47 mi (1,769.42 km) |
| Clayton to Almargem | 1,090.07 mi (1,754.30 km) |
| Clayton to Almeirim | 1,057.02 mi (1,701.12 km) |
| Clayton to Amadora | 1,097.07 mi (1,765.56 km) |
| Clayton to Amarante | 911.74 mi (1,467.30 km) |
| Clayton to Amares | 892.62 mi (1,436.53 km) |
| Clayton to Amora | 1,102.46 mi (1,774.23 km) |
| Clayton to Anadia | 972.38 mi (1,564.90 km) |
| Clayton to Angra do Heroismo | 1,586.71 mi (2,553.56 km) |
| Clayton to Ansiao | 1,006.70 mi (1,620.12 km) |
| Clayton to Anta | 937.33 mi (1,508.48 km) |
