| Onex to Arcos de Valdevez | 779.68 mi (1,254.77 km) |
| Onex to Arcozelo | 816.27 mi (1,313.66 km) |
| Onex to Arganil | 821.70 mi (1,322.40 km) |
| Onex to Arouca | 803.00 mi (1,292.31 km) |
| Onex to Arruda dos Vinhos | 915.66 mi (1,473.62 km) |
| Onex to Aveiro | 831.98 mi (1,338.93 km) |
| Onex to Aver-o-Mar | 810.13 mi (1,303.77 km) |
| Onex to Aves | 787.70 mi (1,267.69 km) |
| Onex to Azambuja | 903.65 mi (1,454.28 km) |
| Onex to Baiao | 785.22 mi (1,263.70 km) |
| Onex to Barcelos | 799.46 mi (1,286.60 km) |
| Onex to Barreiro | 929.23 mi (1,495.45 km) |
| Onex to Batalha | 876.64 mi (1,410.81 km) |
| Onex to Beja | 909.23 mi (1,463.27 km) |
| Onex to Belas | 933.19 mi (1,501.83 km) |
