| Harlow to Montalegre | 782.19 mi (1,258.81 km) |
| Harlow to Montemor-o-Novo | 992.36 mi (1,597.04 km) |
| Harlow to Montemor-o-Velho | 905.54 mi (1,457.32 km) |
| Harlow to Montijo | 1,004.03 mi (1,615.83 km) |
| Harlow to Mortagua | 878.96 mi (1,414.55 km) |
| Harlow to Moura | 1,011.68 mi (1,628.15 km) |
| Harlow to Murtosa | 868.99 mi (1,398.50 km) |
| Harlow to Nazare | 949.60 mi (1,528.23 km) |
| Harlow to Nelas | 865.58 mi (1,393.02 km) |
| Harlow to Obidos | 966.82 mi (1,555.95 km) |
| Harlow to Odemira | 1,069.28 mi (1,720.84 km) |
| Harlow to Odivelas | 1,003.15 mi (1,614.42 km) |
| Harlow to Oeiras | 1,012.88 mi (1,630.08 km) |
| Harlow to Olhao | 1,091.02 mi (1,755.83 km) |
| Harlow to Oliveira de Azemeis | 858.76 mi (1,382.05 km) |
