| Opera to Alfena | 934.55 mi (1,504.02 km) |
| Opera to Alijo | 883.66 mi (1,422.12 km) |
| Opera to Aljustrel | 1,031.99 mi (1,660.83 km) |
| Opera to Almada | 1,047.31 mi (1,685.48 km) |
| Opera to Almargem | 1,046.39 mi (1,684.01 km) |
| Opera to Almeirim | 1,003.71 mi (1,615.32 km) |
| Opera to Amadora | 1,048.79 mi (1,687.87 km) |
| Opera to Amarante | 911.97 mi (1,467.67 km) |
| Opera to Amares | 915.14 mi (1,472.78 km) |
| Opera to Amora | 1,047.49 mi (1,685.78 km) |
| Opera to Anadia | 953.98 mi (1,535.29 km) |
| Opera to Angra do Heroismo | 1,909.39 mi (3,072.87 km) |
| Opera to Ansiao | 970.61 mi (1,562.04 km) |
| Opera to Anta | 945.82 mi (1,522.15 km) |
| Opera to Arcos de Valdevez | 913.27 mi (1,469.76 km) |
