| Antrim to Montalegre | 893.82 mi (1,438.47 km) |
| Antrim to Montemor-o-Novo | 1,114.11 mi (1,792.99 km) |
| Antrim to Montemor-o-Velho | 1,011.83 mi (1,628.39 km) |
| Antrim to Montijo | 1,114.96 mi (1,794.36 km) |
| Antrim to Mortagua | 991.34 mi (1,595.40 km) |
| Antrim to Moura | 1,147.33 mi (1,846.45 km) |
| Antrim to Murtosa | 972.62 mi (1,565.27 km) |
| Antrim to Nazare | 1,052.89 mi (1,694.47 km) |
| Antrim to Nelas | 984.08 mi (1,583.72 km) |
| Antrim to Obidos | 1,070.04 mi (1,722.07 km) |
| Antrim to Odemira | 1,189.35 mi (1,914.08 km) |
| Antrim to Odivelas | 1,109.16 mi (1,785.03 km) |
| Antrim to Oeiras | 1,117.33 mi (1,798.16 km) |
| Antrim to Olhao | 1,224.80 mi (1,971.12 km) |
| Antrim to Oliveira de Azemeis | 964.47 mi (1,552.16 km) |
