| Harrow to Alenquer | 961.42 mi (1,547.26 km) |
| Harrow to Alfena | 812.92 mi (1,308.27 km) |
| Harrow to Alijo | 788.05 mi (1,268.24 km) |
| Harrow to Aljustrel | 1,017.87 mi (1,638.10 km) |
| Harrow to Almada | 987.92 mi (1,589.90 km) |
| Harrow to Almargem | 979.65 mi (1,576.60 km) |
| Harrow to Almeirim | 943.62 mi (1,518.60 km) |
| Harrow to Amadora | 986.11 mi (1,586.99 km) |
| Harrow to Amarante | 801.02 mi (1,289.12 km) |
| Harrow to Amares | 785.04 mi (1,263.40 km) |
| Harrow to Amora | 990.54 mi (1,594.11 km) |
| Harrow to Anadia | 861.39 mi (1,386.28 km) |
| Harrow to Angra do Heroismo | 1,571.19 mi (2,528.58 km) |
| Harrow to Ansiao | 894.15 mi (1,438.99 km) |
| Harrow to Anta | 829.55 mi (1,335.03 km) |
