| Rock Island to Arcos de Valdevez | 4,063.27 mi (6,539.19 km) |
| Rock Island to Arcozelo | 4,080.67 mi (6,567.21 km) |
| Rock Island to Arganil | 4,136.47 mi (6,657.00 km) |
| Rock Island to Arouca | 4,102.69 mi (6,602.64 km) |
| Rock Island to Arruda dos Vinhos | 4,134.00 mi (6,653.04 km) |
| Rock Island to Aveiro | 4,094.88 mi (6,590.08 km) |
| Rock Island to Aver-o-Mar | 4,062.81 mi (6,538.46 km) |
| Rock Island to Aves | 4,082.61 mi (6,570.33 km) |
| Rock Island to Azambuja | 4,140.24 mi (6,663.07 km) |
| Rock Island to Baiao | 4,104.07 mi (6,604.87 km) |
| Rock Island to Barcelos | 4,065.76 mi (6,543.21 km) |
| Rock Island to Barreiro | 4,145.29 mi (6,671.21 km) |
| Rock Island to Batalha | 4,122.60 mi (6,634.68 km) |
| Rock Island to Beja | 4,222.84 mi (6,796.00 km) |
| Rock Island to Belas | 4,131.96 mi (6,649.74 km) |
