| Harrow to Montalegre | 760.15 mi (1,223.35 km) |
| Harrow to Montemor-o-Novo | 971.17 mi (1,562.95 km) |
| Harrow to Montemor-o-Velho | 883.58 mi (1,421.98 km) |
| Harrow to Montijo | 982.42 mi (1,581.06 km) |
| Harrow to Mortagua | 857.18 mi (1,379.49 km) |
| Harrow to Moura | 991.16 mi (1,595.12 km) |
| Harrow to Murtosa | 846.86 mi (1,362.89 km) |
| Harrow to Nazare | 927.61 mi (1,492.85 km) |
| Harrow to Nelas | 844.01 mi (1,358.30 km) |
| Harrow to Obidos | 944.87 mi (1,520.61 km) |
| Harrow to Odemira | 1,048.15 mi (1,686.84 km) |
| Harrow to Odivelas | 981.36 mi (1,579.35 km) |
| Harrow to Oeiras | 991.05 mi (1,594.94 km) |
| Harrow to Olhao | 1,070.55 mi (1,722.88 km) |
| Harrow to Oliveira de Azemeis | 836.69 mi (1,346.52 km) |
