| Castano Primo to Alfena | 915.67 mi (1,473.63 km) |
| Castano Primo to Alijo | 865.15 mi (1,392.32 km) |
| Castano Primo to Aljustrel | 1,016.95 mi (1,636.62 km) |
| Castano Primo to Almada | 1,030.89 mi (1,659.05 km) |
| Castano Primo to Almargem | 1,029.74 mi (1,657.21 km) |
| Castano Primo to Almeirim | 987.02 mi (1,588.46 km) |
| Castano Primo to Amadora | 1,032.28 mi (1,661.30 km) |
| Castano Primo to Amarante | 893.23 mi (1,437.51 km) |
| Castano Primo to Amares | 895.91 mi (1,441.83 km) |
| Castano Primo to Amora | 1,031.15 mi (1,659.48 km) |
| Castano Primo to Anadia | 936.02 mi (1,506.39 km) |
| Castano Primo to Angra do Heroismo | 1,887.87 mi (3,038.24 km) |
| Castano Primo to Ansiao | 953.22 mi (1,534.06 km) |
| Castano Primo to Anta | 927.15 mi (1,492.11 km) |
| Castano Primo to Arcos de Valdevez | 893.76 mi (1,438.37 km) |
