| Orsta to Alfena | 1,569.80 mi (2,526.35 km) |
| Orsta to Alijo | 1,551.12 mi (2,496.29 km) |
| Orsta to Aljustrel | 1,784.39 mi (2,871.70 km) |
| Orsta to Almada | 1,748.52 mi (2,813.97 km) |
| Orsta to Almargem | 1,739.23 mi (2,799.02 km) |
| Orsta to Almeirim | 1,705.79 mi (2,745.20 km) |
| Orsta to Amadora | 1,746.18 mi (2,810.21 km) |
| Orsta to Amarante | 1,560.73 mi (2,511.75 km) |
| Orsta to Amares | 1,541.85 mi (2,481.37 km) |
| Orsta to Amora | 1,751.47 mi (2,818.72 km) |
| Orsta to Anadia | 1,621.40 mi (2,609.40 km) |
| Orsta to Angra do Heroismo | 2,144.83 mi (3,451.77 km) |
| Orsta to Ansiao | 1,655.55 mi (2,664.34 km) |
| Orsta to Anta | 1,586.57 mi (2,553.34 km) |
| Orsta to Arcos de Valdevez | 1,528.07 mi (2,459.19 km) |
