| Houghton le Spring to Alenquer | 1,146.08 mi (1,844.44 km) |
| Houghton le Spring to Alfena | 993.59 mi (1,599.02 km) |
| Houghton le Spring to Alijo | 976.54 mi (1,571.60 km) |
| Houghton le Spring to Aljustrel | 1,210.82 mi (1,948.62 km) |
| Houghton le Spring to Almada | 1,172.73 mi (1,887.33 km) |
| Houghton le Spring to Almargem | 1,163.22 mi (1,872.03 km) |
| Houghton le Spring to Almeirim | 1,130.51 mi (1,819.37 km) |
| Houghton le Spring to Amadora | 1,170.27 mi (1,883.37 km) |
| Houghton le Spring to Amarante | 985.09 mi (1,585.35 km) |
| Houghton le Spring to Amares | 965.68 mi (1,554.11 km) |
| Houghton le Spring to Amora | 1,175.76 mi (1,892.20 km) |
| Houghton le Spring to Anadia | 1,045.70 mi (1,682.90 km) |
| Houghton le Spring to Angra do Heroismo | 1,636.94 mi (2,634.41 km) |
| Houghton le Spring to Ansiao | 1,080.14 mi (1,738.31 km) |
| Houghton le Spring to Anta | 1,010.35 mi (1,626.00 km) |
