| Harlow to Arcos de Valdevez | 795.15 mi (1,279.67 km) |
| Harlow to Arcozelo | 849.11 mi (1,366.52 km) |
| Harlow to Arganil | 888.79 mi (1,430.36 km) |
| Harlow to Arouca | 847.77 mi (1,364.36 km) |
| Harlow to Arruda dos Vinhos | 988.50 mi (1,590.84 km) |
| Harlow to Aveiro | 875.60 mi (1,409.14 km) |
| Harlow to Aver-o-Mar | 830.67 mi (1,336.83 km) |
| Harlow to Aves | 817.49 mi (1,315.62 km) |
| Harlow to Azambuja | 978.95 mi (1,575.46 km) |
| Harlow to Baiao | 828.52 mi (1,333.38 km) |
| Harlow to Barcelos | 820.13 mi (1,319.87 km) |
| Harlow to Barreiro | 1,008.59 mi (1,623.16 km) |
| Harlow to Batalha | 940.60 mi (1,513.76 km) |
| Harlow to Beja | 1,025.98 mi (1,651.15 km) |
| Harlow to Belas | 1,006.08 mi (1,619.13 km) |
