| Chicago Heights to Alenquer | 3,996.28 mi (6,431.39 km) |
| Chicago Heights to Alfena | 3,944.77 mi (6,348.50 km) |
| Chicago Heights to Alijo | 3,991.18 mi (6,423.18 km) |
| Chicago Heights to Aljustrel | 4,075.50 mi (6,558.89 km) |
| Chicago Heights to Almada | 4,002.43 mi (6,441.29 km) |
| Chicago Heights to Almargem | 3,991.38 mi (6,423.51 km) |
| Chicago Heights to Almeirim | 4,009.70 mi (6,452.99 km) |
| Chicago Heights to Amadora | 3,997.10 mi (6,432.70 km) |
| Chicago Heights to Amarante | 3,964.66 mi (6,380.51 km) |
| Chicago Heights to Amares | 3,940.89 mi (6,342.25 km) |
| Chicago Heights to Amora | 4,006.13 mi (6,447.24 km) |
| Chicago Heights to Anadia | 3,976.01 mi (6,398.78 km) |
| Chicago Heights to Angra do Heroismo | 3,134.03 mi (5,043.74 km) |
| Chicago Heights to Ansiao | 3,993.58 mi (6,427.05 km) |
| Chicago Heights to Anta | 3,947.93 mi (6,353.59 km) |
