| Castleton to Alenquer | 1,055.20 mi (1,698.18 km) |
| Castleton to Alfena | 902.78 mi (1,452.89 km) |
| Castleton to Alijo | 885.58 mi (1,425.20 km) |
| Castleton to Aljustrel | 1,119.86 mi (1,802.23 km) |
| Castleton to Almada | 1,081.85 mi (1,741.07 km) |
| Castleton to Almargem | 1,072.38 mi (1,725.83 km) |
| Castleton to Almeirim | 1,039.57 mi (1,673.02 km) |
| Castleton to Amadora | 1,079.41 mi (1,737.14 km) |
| Castleton to Amarante | 894.18 mi (1,439.05 km) |
| Castleton to Amares | 874.86 mi (1,407.95 km) |
| Castleton to Amora | 1,084.87 mi (1,745.92 km) |
| Castleton to Anadia | 954.80 mi (1,536.61 km) |
| Castleton to Angra do Heroismo | 1,567.27 mi (2,522.28 km) |
| Castleton to Ansiao | 989.21 mi (1,591.98 km) |
| Castleton to Anta | 919.55 mi (1,479.87 km) |
