| Olton to Alenquer | 986.99 mi (1,588.40 km) |
| Olton to Alfena | 835.57 mi (1,344.72 km) |
| Olton to Alijo | 815.75 mi (1,312.82 km) |
| Olton to Aljustrel | 1,049.03 mi (1,688.25 km) |
| Olton to Almada | 1,013.63 mi (1,631.28 km) |
| Olton to Almargem | 1,004.56 mi (1,616.68 km) |
| Olton to Almeirim | 970.59 mi (1,562.02 km) |
| Olton to Amadora | 1,011.40 mi (1,627.70 km) |
| Olton to Amarante | 825.82 mi (1,329.04 km) |
| Olton to Amares | 807.59 mi (1,299.69 km) |
| Olton to Amora | 1,016.52 mi (1,635.93 km) |
| Olton to Anadia | 886.51 mi (1,426.70 km) |
| Olton to Angra do Heroismo | 1,541.33 mi (2,480.53 km) |
| Olton to Ansiao | 920.43 mi (1,481.29 km) |
| Olton to Anta | 852.33 mi (1,371.69 km) |
