| Prospect Heights to Arcos de Valdevez | 3,922.68 mi (6,312.94 km) |
| Prospect Heights to Arcozelo | 3,939.63 mi (6,340.23 km) |
| Prospect Heights to Arganil | 3,995.16 mi (6,429.58 km) |
| Prospect Heights to Arouca | 3,961.67 mi (6,375.69 km) |
| Prospect Heights to Arruda dos Vinhos | 3,991.98 mi (6,424.48 km) |
| Prospect Heights to Aveiro | 3,953.64 mi (6,362.77 km) |
| Prospect Heights to Aver-o-Mar | 3,921.92 mi (6,311.71 km) |
| Prospect Heights to Aves | 3,941.84 mi (6,343.78 km) |
| Prospect Heights to Azambuja | 3,998.28 mi (6,434.61 km) |
| Prospect Heights to Baiao | 3,963.22 mi (6,378.19 km) |
| Prospect Heights to Barcelos | 3,924.96 mi (6,316.61 km) |
| Prospect Heights to Barreiro | 4,003.16 mi (6,442.46 km) |
| Prospect Heights to Batalha | 3,980.89 mi (6,406.62 km) |
| Prospect Heights to Beja | 4,080.67 mi (6,567.21 km) |
| Prospect Heights to Belas | 3,989.82 mi (6,421.00 km) |
