| Harrow Weald to Montalegre | 761.53 mi (1,225.56 km) |
| Harrow Weald to Montemor-o-Novo | 972.58 mi (1,565.21 km) |
| Harrow Weald to Montemor-o-Velho | 884.96 mi (1,424.20 km) |
| Harrow Weald to Montijo | 983.81 mi (1,583.30 km) |
| Harrow Weald to Mortagua | 858.56 mi (1,381.73 km) |
| Harrow Weald to Moura | 992.58 mi (1,597.40 km) |
| Harrow Weald to Murtosa | 848.23 mi (1,365.10 km) |
| Harrow Weald to Nazare | 928.99 mi (1,495.07 km) |
| Harrow Weald to Nelas | 845.40 mi (1,360.55 km) |
| Harrow Weald to Obidos | 946.24 mi (1,522.83 km) |
| Harrow Weald to Odemira | 1,049.56 mi (1,689.11 km) |
| Harrow Weald to Odivelas | 982.74 mi (1,581.57 km) |
| Harrow Weald to Oeiras | 992.43 mi (1,597.16 km) |
| Harrow Weald to Olhao | 1,071.97 mi (1,725.16 km) |
| Harrow Weald to Oliveira de Azemeis | 838.06 mi (1,348.73 km) |
