| Olton to Arcos de Valdevez | 794.18 mi (1,278.11 km) |
| Olton to Arcozelo | 849.46 mi (1,367.07 km) |
| Olton to Arganil | 894.55 mi (1,439.63 km) |
| Olton to Arouca | 850.59 mi (1,368.89 km) |
| Olton to Arruda dos Vinhos | 992.20 mi (1,596.79 km) |
| Olton to Aveiro | 877.12 mi (1,411.59 km) |
| Olton to Aver-o-Mar | 829.23 mi (1,334.52 km) |
| Olton to Aves | 818.49 mi (1,317.23 km) |
| Olton to Azambuja | 983.41 mi (1,582.65 km) |
| Olton to Baiao | 831.82 mi (1,338.68 km) |
| Olton to Barcelos | 819.15 mi (1,318.30 km) |
| Olton to Barreiro | 1,013.01 mi (1,630.29 km) |
| Olton to Batalha | 943.99 mi (1,519.20 km) |
| Olton to Beja | 1,037.32 mi (1,669.41 km) |
| Olton to Belas | 1,009.29 mi (1,624.29 km) |
