| Big Spring to Arcos de Valdevez | 4,919.55 mi (7,917.25 km) |
| Big Spring to Arcozelo | 4,934.10 mi (7,940.67 km) |
| Big Spring to Arganil | 4,987.88 mi (8,027.22 km) |
| Big Spring to Arouca | 4,956.25 mi (7,976.31 km) |
| Big Spring to Arruda dos Vinhos | 4,979.34 mi (8,013.47 km) |
| Big Spring to Aveiro | 4,946.87 mi (7,961.21 km) |
| Big Spring to Aver-o-Mar | 4,917.22 mi (7,913.49 km) |
| Big Spring to Aves | 4,937.75 mi (7,946.55 km) |
| Big Spring to Azambuja | 4,986.22 mi (8,024.55 km) |
| Big Spring to Baiao | 4,958.69 mi (7,980.24 km) |
| Big Spring to Barcelos | 4,920.74 mi (7,919.16 km) |
| Big Spring to Barreiro | 4,989.40 mi (8,029.67 km) |
| Big Spring to Batalha | 4,970.86 mi (7,999.83 km) |
| Big Spring to Beja | 5,066.54 mi (8,153.81 km) |
| Big Spring to Belas | 4,976.14 mi (8,008.33 km) |
