| Barreiro to Montemor-o-Novo | 45.88 mi (73.83 km) |
| Barreiro to Montemor-o-Velho | 105.64 mi (170.01 km) |
| Barreiro to Montijo | 9.06 mi (14.59 km) |
| Barreiro to Mortagua | 129.88 mi (209.03 km) |
| Barreiro to Moura | 94.98 mi (152.86 km) |
| Barreiro to Murtosa | 144.63 mi (232.77 km) |
| Barreiro to Nazare | 64.48 mi (103.78 km) |
| Barreiro to Nelas | 143.30 mi (230.61 km) |
| Barreiro to Obidos | 48.02 mi (77.28 km) |
| Barreiro to Odemira | 78.47 mi (126.29 km) |
| Barreiro to Odivelas | 10.49 mi (16.88 km) |
| Barreiro to Oeiras | 13.53 mi (21.78 km) |
| Barreiro to Olhao | 131.61 mi (211.81 km) |
| Barreiro to Oliveira de Azemeis | 153.41 mi (246.90 km) |
| Barreiro to Oliveira de Frades | 149.22 mi (240.15 km) |
