| Seaham to Alenquer | 1,147.85 mi (1,847.29 km) |
| Seaham to Alfena | 995.43 mi (1,601.99 km) |
| Seaham to Alijo | 978.13 mi (1,574.16 km) |
| Seaham to Aljustrel | 1,212.32 mi (1,951.04 km) |
| Seaham to Almada | 1,174.50 mi (1,890.18 km) |
| Seaham to Almargem | 1,165.03 mi (1,874.94 km) |
| Seaham to Almeirim | 1,132.20 mi (1,822.10 km) |
| Seaham to Amadora | 1,172.07 mi (1,886.26 km) |
| Seaham to Amarante | 986.83 mi (1,588.15 km) |
| Seaham to Amares | 967.51 mi (1,557.06 km) |
| Seaham to Amora | 1,177.52 mi (1,895.03 km) |
| Seaham to Anadia | 1,047.45 mi (1,685.71 km) |
| Seaham to Angra do Heroismo | 1,641.21 mi (2,641.27 km) |
| Seaham to Ansiao | 1,081.85 mi (1,741.06 km) |
| Seaham to Anta | 1,012.20 mi (1,628.97 km) |
