| Butte to Arcos de Valdevez | 4,796.05 mi (7,718.50 km) |
| Butte to Arcozelo | 4,825.79 mi (7,766.36 km) |
| Butte to Arganil | 4,888.16 mi (7,866.73 km) |
| Butte to Arouca | 4,846.42 mi (7,799.55 km) |
| Butte to Arruda dos Vinhos | 4,909.36 mi (7,900.85 km) |
| Butte to Aveiro | 4,845.68 mi (7,798.37 km) |
| Butte to Aver-o-Mar | 4,804.24 mi (7,731.68 km) |
| Butte to Aves | 4,820.00 mi (7,757.04 km) |
| Butte to Azambuja | 4,913.00 mi (7,906.71 km) |
| Butte to Baiao | 4,843.09 mi (7,794.19 km) |
| Butte to Barcelos | 4,804.52 mi (7,732.13 km) |
| Butte to Barreiro | 4,924.66 mi (7,925.48 km) |
| Butte to Batalha | 4,887.37 mi (7,865.47 km) |
| Butte to Beja | 5,001.01 mi (8,048.34 km) |
| Butte to Belas | 4,911.51 mi (7,904.32 km) |
