| Cwmbran to Montalegre | 715.37 mi (1,151.27 km) |
| Cwmbran to Montemor-o-Novo | 932.80 mi (1,501.20 km) |
| Cwmbran to Montemor-o-Velho | 838.37 mi (1,349.23 km) |
| Cwmbran to Montijo | 940.00 mi (1,512.78 km) |
| Cwmbran to Mortagua | 813.98 mi (1,309.97 km) |
| Cwmbran to Moura | 958.49 mi (1,542.53 km) |
| Cwmbran to Murtosa | 800.21 mi (1,287.81 km) |
| Cwmbran to Nazare | 881.77 mi (1,419.07 km) |
| Cwmbran to Nelas | 803.04 mi (1,292.36 km) |
| Cwmbran to Obidos | 899.17 mi (1,447.08 km) |
| Cwmbran to Odemira | 1,009.79 mi (1,625.10 km) |
| Cwmbran to Odivelas | 937.07 mi (1,508.06 km) |
| Cwmbran to Oeiras | 946.26 mi (1,522.86 km) |
| Cwmbran to Olhao | 1,037.73 mi (1,670.07 km) |
| Cwmbran to Oliveira de Azemeis | 790.69 mi (1,272.49 km) |
