| Amersham to Montalegre | 760.28 mi (1,223.55 km) |
| Amersham to Montemor-o-Novo | 972.22 mi (1,564.64 km) |
| Amersham to Montemor-o-Velho | 883.77 mi (1,422.29 km) |
| Amersham to Montijo | 983.01 mi (1,582.00 km) |
| Amersham to Mortagua | 857.58 mi (1,380.15 km) |
| Amersham to Moura | 992.88 mi (1,597.88 km) |
| Amersham to Murtosa | 846.85 mi (1,362.87 km) |
| Amersham to Nazare | 927.76 mi (1,493.09 km) |
| Amersham to Nelas | 844.66 mi (1,359.35 km) |
| Amersham to Obidos | 945.04 mi (1,520.90 km) |
| Amersham to Odemira | 1,049.26 mi (1,688.61 km) |
| Amersham to Odivelas | 981.73 mi (1,579.94 km) |
| Amersham to Oeiras | 991.36 mi (1,595.44 km) |
| Amersham to Olhao | 1,072.29 mi (1,725.69 km) |
| Amersham to Oliveira de Azemeis | 836.75 mi (1,346.61 km) |
