| Glen Burnie to Arcos de Valdevez | 3,490.21 mi (5,616.96 km) |
| Glen Burnie to Arcozelo | 3,499.50 mi (5,631.91 km) |
| Glen Burnie to Arganil | 3,549.70 mi (5,712.69 km) |
| Glen Burnie to Arouca | 3,521.73 mi (5,667.68 km) |
| Glen Burnie to Arruda dos Vinhos | 3,532.99 mi (5,685.80 km) |
| Glen Burnie to Aveiro | 3,509.82 mi (5,648.52 km) |
| Glen Burnie to Aver-o-Mar | 3,484.43 mi (5,607.65 km) |
| Glen Burnie to Aves | 3,506.14 mi (5,642.59 km) |
| Glen Burnie to Azambuja | 3,540.62 mi (5,698.07 km) |
| Glen Burnie to Baiao | 3,525.98 mi (5,674.51 km) |
| Glen Burnie to Barcelos | 3,488.95 mi (5,614.91 km) |
| Glen Burnie to Barreiro | 3,541.59 mi (5,699.63 km) |
| Glen Burnie to Batalha | 3,528.26 mi (5,678.19 km) |
| Glen Burnie to Beja | 3,617.89 mi (5,822.43 km) |
| Glen Burnie to Belas | 3,528.48 mi (5,678.53 km) |
