| Irmo to Alenquer | 3,912.85 mi (6,297.13 km) |
| Irmo to Alfena | 3,888.93 mi (6,258.63 km) |
| Irmo to Alijo | 3,939.87 mi (6,340.61 km) |
| Irmo to Aljustrel | 3,982.65 mi (6,409.46 km) |
| Irmo to Almada | 3,914.14 mi (6,299.19 km) |
| Irmo to Almargem | 3,904.56 mi (6,283.78 km) |
| Irmo to Almeirim | 3,929.66 mi (6,324.17 km) |
| Irmo to Amadora | 3,909.10 mi (6,291.10 km) |
| Irmo to Amarante | 3,910.94 mi (6,294.05 km) |
| Irmo to Amares | 3,890.27 mi (6,260.79 km) |
| Irmo to Amora | 3,917.38 mi (6,304.41 km) |
| Irmo to Anadia | 3,911.07 mi (6,294.25 km) |
| Irmo to Angra do Heroismo | 2,976.12 mi (4,789.61 km) |
| Irmo to Ansiao | 3,922.60 mi (6,312.82 km) |
| Irmo to Anta | 3,888.98 mi (6,258.71 km) |
