| Castle Rock to Arcos de Valdevez | 4,765.99 mi (7,670.12 km) |
| Castle Rock to Arcozelo | 4,787.72 mi (7,705.09 km) |
| Castle Rock to Arganil | 4,846.07 mi (7,799.00 km) |
| Castle Rock to Arouca | 4,809.41 mi (7,740.00 km) |
| Castle Rock to Arruda dos Vinhos | 4,851.27 mi (7,807.36 km) |
| Castle Rock to Aveiro | 4,803.93 mi (7,731.17 km) |
| Castle Rock to Aver-o-Mar | 4,768.49 mi (7,674.14 km) |
| Castle Rock to Aves | 4,787.05 mi (7,704.01 km) |
| Castle Rock to Azambuja | 4,856.72 mi (7,816.13 km) |
| Castle Rock to Baiao | 4,809.21 mi (7,739.67 km) |
| Castle Rock to Barcelos | 4,770.55 mi (7,677.46 km) |
| Castle Rock to Barreiro | 4,863.89 mi (7,827.67 km) |
| Castle Rock to Batalha | 4,836.41 mi (7,783.44 km) |
| Castle Rock to Beja | 4,941.50 mi (7,952.57 km) |
| Castle Rock to Belas | 4,850.53 mi (7,806.18 km) |
