| Castano Primo to Arcozelo | 926.40 mi (1,490.90 km) |
| Castano Primo to Arganil | 925.53 mi (1,489.50 km) |
| Castano Primo to Arouca | 911.52 mi (1,466.96 km) |
| Castano Primo to Arruda dos Vinhos | 1,015.42 mi (1,634.16 km) |
| Castano Primo to Aveiro | 939.76 mi (1,512.40 km) |
| Castano Primo to Aver-o-Mar | 922.46 mi (1,484.56 km) |
| Castano Primo to Aves | 899.26 mi (1,447.22 km) |
| Castano Primo to Azambuja | 1,003.27 mi (1,614.60 km) |
| Castano Primo to Baiao | 894.60 mi (1,439.72 km) |
| Castano Primo to Barcelos | 912.10 mi (1,467.89 km) |
| Castano Primo to Barreiro | 1,027.27 mi (1,653.23 km) |
| Castano Primo to Batalha | 979.30 mi (1,576.03 km) |
| Castano Primo to Beja | 999.75 mi (1,608.94 km) |
| Castano Primo to Belas | 1,032.44 mi (1,661.55 km) |
| Castano Primo to Benavente | 1,003.95 mi (1,615.70 km) |
