| Romeoville to Arcos de Valdevez | 3,946.30 mi (6,350.96 km) |
| Romeoville to Arcozelo | 3,962.86 mi (6,377.61 km) |
| Romeoville to Arganil | 4,018.13 mi (6,466.55 km) |
| Romeoville to Arouca | 3,984.92 mi (6,413.11 km) |
| Romeoville to Arruda dos Vinhos | 4,014.20 mi (6,460.23 km) |
| Romeoville to Aveiro | 3,976.68 mi (6,399.85 km) |
| Romeoville to Aver-o-Mar | 3,945.28 mi (6,349.31 km) |
| Romeoville to Aves | 3,965.30 mi (6,381.54 km) |
| Romeoville to Azambuja | 4,020.58 mi (6,470.50 km) |
| Romeoville to Baiao | 3,986.61 mi (6,415.84 km) |
| Romeoville to Barcelos | 3,948.40 mi (6,354.33 km) |
| Romeoville to Barreiro | 4,025.23 mi (6,477.98 km) |
| Romeoville to Batalha | 4,003.46 mi (6,442.95 km) |
| Romeoville to Beja | 4,102.71 mi (6,602.68 km) |
| Romeoville to Belas | 4,011.90 mi (6,456.54 km) |
