| Chicago to Arcos de Valdevez | 3,920.78 mi (6,309.88 km) |
| Chicago to Arcozelo | 3,937.38 mi (6,336.60 km) |
| Chicago to Arganil | 3,992.67 mi (6,425.58 km) |
| Chicago to Arouca | 3,959.44 mi (6,372.10 km) |
| Chicago to Arruda dos Vinhos | 3,988.84 mi (6,419.41 km) |
| Chicago to Aveiro | 3,951.22 mi (6,358.87 km) |
| Chicago to Aver-o-Mar | 3,919.78 mi (6,308.27 km) |
| Chicago to Aves | 3,939.79 mi (6,340.49 km) |
| Chicago to Azambuja | 3,995.20 mi (6,429.66 km) |
| Chicago to Baiao | 3,961.11 mi (6,374.80 km) |
| Chicago to Barcelos | 3,922.89 mi (6,313.29 km) |
| Chicago to Barreiro | 3,999.89 mi (6,437.19 km) |
| Chicago to Batalha | 3,978.05 mi (6,402.05 km) |
| Chicago to Beja | 4,077.37 mi (6,561.90 km) |
| Chicago to Belas | 3,986.56 mi (6,415.75 km) |
