| Chicago Heights to Arcos de Valdevez | 3,929.40 mi (6,323.76 km) |
| Chicago Heights to Arcozelo | 3,945.66 mi (6,349.93 km) |
| Chicago Heights to Arganil | 4,000.73 mi (6,438.55 km) |
| Chicago Heights to Arouca | 3,967.74 mi (6,385.45 km) |
| Chicago Heights to Arruda dos Vinhos | 3,996.25 mi (6,431.34 km) |
| Chicago Heights to Aveiro | 3,959.33 mi (6,371.93 km) |
| Chicago Heights to Aver-o-Mar | 3,928.17 mi (6,321.79 km) |
| Chicago Heights to Aves | 3,948.28 mi (6,354.14 km) |
| Chicago Heights to Azambuja | 4,002.68 mi (6,441.69 km) |
| Chicago Heights to Baiao | 3,969.54 mi (6,388.35 km) |
| Chicago Heights to Barcelos | 3,931.36 mi (6,326.91 km) |
| Chicago Heights to Barreiro | 4,007.18 mi (6,448.93 km) |
| Chicago Heights to Batalha | 3,985.76 mi (6,414.47 km) |
| Chicago Heights to Beja | 4,084.63 mi (6,573.58 km) |
| Chicago Heights to Belas | 3,993.86 mi (6,427.49 km) |
