| Irmo to Arcos de Valdevez | 3,881.19 mi (6,246.18 km) |
| Irmo to Arcozelo | 3,887.22 mi (6,255.88 km) |
| Irmo to Arganil | 3,934.78 mi (6,332.42 km) |
| Irmo to Arouca | 3,909.40 mi (6,291.57 km) |
| Irmo to Arruda dos Vinhos | 3,911.84 mi (6,295.50 km) |
| Irmo to Aveiro | 3,895.88 mi (6,269.81 km) |
| Irmo to Aver-o-Mar | 3,873.36 mi (6,233.57 km) |
| Irmo to Aves | 3,895.70 mi (6,269.52 km) |
| Irmo to Azambuja | 3,920.07 mi (6,308.74 km) |
| Irmo to Baiao | 3,914.77 mi (6,300.21 km) |
| Irmo to Barcelos | 3,878.47 mi (6,241.79 km) |
| Irmo to Barreiro | 3,919.11 mi (6,307.19 km) |
| Irmo to Batalha | 3,910.20 mi (6,292.85 km) |
| Irmo to Beja | 3,994.32 mi (6,428.23 km) |
| Irmo to Belas | 3,906.19 mi (6,286.41 km) |
