| Syston to Alenquer | 1,015.99 mi (1,635.07 km) |
| Syston to Alfena | 865.14 mi (1,392.31 km) |
| Syston to Alijo | 844.08 mi (1,358.42 km) |
| Syston to Aljustrel | 1,076.63 mi (1,732.67 km) |
| Syston to Almada | 1,042.62 mi (1,677.93 km) |
| Syston to Almargem | 1,033.73 mi (1,663.63 km) |
| Syston to Almeirim | 999.23 mi (1,608.11 km) |
| Syston to Amadora | 1,040.49 mi (1,674.50 km) |
| Syston to Amarante | 854.88 mi (1,375.80 km) |
| Syston to Amares | 837.16 mi (1,347.28 km) |
| Syston to Amora | 1,045.44 mi (1,682.47 km) |
| Syston to Anadia | 915.55 mi (1,473.43 km) |
| Syston to Angra do Heroismo | 1,576.74 mi (2,537.52 km) |
| Syston to Ansiao | 949.21 mi (1,527.61 km) |
| Syston to Anta | 881.89 mi (1,419.26 km) |
