| Round Rock to Alenquer | 4,862.73 mi (7,825.81 km) |
| Round Rock to Alfena | 4,825.80 mi (7,766.37 km) |
| Round Rock to Alijo | 4,874.69 mi (7,845.05 km) |
| Round Rock to Aljustrel | 4,936.85 mi (7,945.10 km) |
| Round Rock to Almada | 4,866.13 mi (7,831.28 km) |
| Round Rock to Almargem | 4,855.88 mi (7,814.78 km) |
| Round Rock to Almeirim | 4,878.11 mi (7,850.56 km) |
| Round Rock to Amadora | 4,860.95 mi (7,822.94 km) |
| Round Rock to Amarante | 4,846.85 mi (7,800.24 km) |
| Round Rock to Amares | 4,824.53 mi (7,764.32 km) |
| Round Rock to Amora | 4,869.58 mi (7,836.83 km) |
| Round Rock to Anadia | 4,852.47 mi (7,809.29 km) |
| Round Rock to Angra do Heroismo | 3,948.93 mi (6,355.18 km) |
| Round Rock to Ansiao | 4,866.90 mi (7,832.51 km) |
| Round Rock to Anta | 4,827.39 mi (7,768.93 km) |
