| Lake Butler to Arcos de Valdevez | 4,107.88 mi (6,611.00 km) |
| Lake Butler to Arcozelo | 4,108.63 mi (6,612.20 km) |
| Lake Butler to Arganil | 4,151.68 mi (6,681.48 km) |
| Lake Butler to Arouca | 4,130.56 mi (6,647.50 km) |
| Lake Butler to Arruda dos Vinhos | 4,119.36 mi (6,629.48 km) |
| Lake Butler to Aveiro | 4,114.58 mi (6,621.78 km) |
| Lake Butler to Aver-o-Mar | 4,096.81 mi (6,593.17 km) |
| Lake Butler to Aves | 4,119.98 mi (6,630.46 km) |
| Lake Butler to Azambuja | 4,128.43 mi (6,644.06 km) |
| Lake Butler to Baiao | 4,137.68 mi (6,658.95 km) |
| Lake Butler to Barcelos | 4,102.82 mi (6,602.85 km) |
| Lake Butler to Barreiro | 4,124.58 mi (6,637.87 km) |
| Lake Butler to Batalha | 4,122.41 mi (6,634.37 km) |
| Lake Butler to Beja | 4,197.55 mi (6,755.30 km) |
| Lake Butler to Belas | 4,112.06 mi (6,617.72 km) |
