| Middle Island to Arcos de Valdevez | 3,264.13 mi (5,253.11 km) |
| Middle Island to Arcozelo | 3,273.95 mi (5,268.91 km) |
| Middle Island to Arganil | 3,324.59 mi (5,350.41 km) |
| Middle Island to Arouca | 3,296.18 mi (5,304.68 km) |
| Middle Island to Arruda dos Vinhos | 3,309.11 mi (5,325.51 km) |
| Middle Island to Aveiro | 3,284.55 mi (5,285.98 km) |
| Middle Island to Aver-o-Mar | 3,258.67 mi (5,244.33 km) |
| Middle Island to Aves | 3,280.28 mi (5,279.10 km) |
| Middle Island to Azambuja | 3,316.61 mi (5,337.57 km) |
| Middle Island to Baiao | 3,300.23 mi (5,311.21 km) |
| Middle Island to Barcelos | 3,263.09 mi (5,251.44 km) |
| Middle Island to Barreiro | 3,317.99 mi (5,339.79 km) |
| Middle Island to Batalha | 3,303.76 mi (5,316.89 km) |
| Middle Island to Beja | 3,394.49 mi (5,462.90 km) |
| Middle Island to Belas | 3,304.84 mi (5,318.63 km) |
