| Helensburgh to Alenquer | 1,188.62 mi (1,912.89 km) |
| Helensburgh to Alfena | 1,035.28 mi (1,666.12 km) |
| Helensburgh to Alijo | 1,025.92 mi (1,651.07 km) |
| Helensburgh to Aljustrel | 1,260.63 mi (2,028.79 km) |
| Helensburgh to Almada | 1,214.98 mi (1,955.33 km) |
| Helensburgh to Almargem | 1,204.44 mi (1,938.35 km) |
| Helensburgh to Almeirim | 1,175.45 mi (1,891.70 km) |
| Helensburgh to Amadora | 1,211.94 mi (1,950.43 km) |
| Helensburgh to Amarante | 1,030.11 mi (1,657.81 km) |
| Helensburgh to Amares | 1,007.98 mi (1,622.19 km) |
| Helensburgh to Amora | 1,218.36 mi (1,960.76 km) |
| Helensburgh to Anadia | 1,089.69 mi (1,753.69 km) |
| Helensburgh to Angra do Heroismo | 1,581.36 mi (2,544.96 km) |
| Helensburgh to Ansiao | 1,125.08 mi (1,810.64 km) |
| Helensburgh to Anta | 1,051.81 mi (1,692.72 km) |
