| Helena to Montalegre | 4,766.38 mi (7,670.74 km) |
| Helena to Montemor-o-Novo | 4,904.96 mi (7,893.77 km) |
| Helena to Montemor-o-Velho | 4,813.43 mi (7,746.46 km) |
| Helena to Montijo | 4,877.25 mi (7,849.17 km) |
| Helena to Mortagua | 4,817.39 mi (7,752.83 km) |
| Helena to Moura | 4,959.54 mi (7,981.60 km) |
| Helena to Murtosa | 4,787.89 mi (7,705.36 km) |
| Helena to Nazare | 4,826.38 mi (7,767.31 km) |
| Helena to Nelas | 4,827.64 mi (7,769.34 km) |
| Helena to Obidos | 4,834.63 mi (7,780.59 km) |
| Helena to Odemira | 4,941.23 mi (7,952.15 km) |
| Helena to Odivelas | 4,861.33 mi (7,823.56 km) |
| Helena to Oeiras | 4,861.28 mi (7,823.47 km) |
| Helena to Olhao | 4,999.22 mi (8,045.47 km) |
| Helena to Oliveira de Azemeis | 4,788.64 mi (7,706.58 km) |
