| Welwyn Garden City to Alenquer | 978.05 mi (1,574.02 km) |
| Welwyn Garden City to Alfena | 829.46 mi (1,334.88 km) |
| Welwyn Garden City to Alijo | 804.71 mi (1,295.05 km) |
| Welwyn Garden City to Aljustrel | 1,034.58 mi (1,665.00 km) |
| Welwyn Garden City to Almada | 1,004.55 mi (1,616.67 km) |
| Welwyn Garden City to Almargem | 996.27 mi (1,603.34 km) |
| Welwyn Garden City to Almeirim | 960.27 mi (1,545.41 km) |
| Welwyn Garden City to Amadora | 1,002.74 mi (1,613.75 km) |
| Welwyn Garden City to Amarante | 817.61 mi (1,315.82 km) |
| Welwyn Garden City to Amares | 801.57 mi (1,290.01 km) |
| Welwyn Garden City to Amora | 1,007.18 mi (1,620.89 km) |
| Welwyn Garden City to Anadia | 878.00 mi (1,413.01 km) |
| Welwyn Garden City to Angra do Heroismo | 1,583.48 mi (2,548.36 km) |
| Welwyn Garden City to Ansiao | 910.78 mi (1,465.77 km) |
| Welwyn Garden City to Anta | 846.09 mi (1,361.65 km) |
