| Halstead to Montalegre | 803.56 mi (1,293.21 km) |
| Halstead to Montemor-o-Novo | 1,012.71 mi (1,629.81 km) |
| Halstead to Montemor-o-Velho | 926.80 mi (1,491.54 km) |
| Halstead to Montijo | 1,024.87 mi (1,649.36 km) |
| Halstead to Mortagua | 900.03 mi (1,448.45 km) |
| Halstead to Moura | 1,031.30 mi (1,659.71 km) |
| Halstead to Murtosa | 890.45 mi (1,433.04 km) |
| Halstead to Nazare | 970.89 mi (1,562.49 km) |
| Halstead to Nelas | 886.41 mi (1,426.54 km) |
| Halstead to Obidos | 988.08 mi (1,590.16 km) |
| Halstead to Odemira | 1,089.56 mi (1,753.48 km) |
| Halstead to Odivelas | 1,024.21 mi (1,648.31 km) |
| Halstead to Oeiras | 1,033.99 mi (1,664.05 km) |
| Halstead to Olhao | 1,110.57 mi (1,787.29 km) |
| Halstead to Oliveira de Azemeis | 880.17 mi (1,416.49 km) |
