| Sligo to Montemor-o-Novo | 1,079.08 mi (1,736.61 km) |
| Sligo to Montemor-o-Velho | 974.26 mi (1,567.92 km) |
| Sligo to Montijo | 1,076.89 mi (1,733.08 km) |
| Sligo to Mortagua | 955.87 mi (1,538.32 km) |
| Sligo to Moura | 1,115.77 mi (1,795.66 km) |
| Sligo to Murtosa | 935.09 mi (1,504.89 km) |
| Sligo to Nazare | 1,013.74 mi (1,631.45 km) |
| Sligo to Nelas | 950.48 mi (1,529.66 km) |
| Sligo to Obidos | 1,030.57 mi (1,658.54 km) |
| Sligo to Odemira | 1,152.73 mi (1,855.14 km) |
| Sligo to Odivelas | 1,069.81 mi (1,721.70 km) |
| Sligo to Oeiras | 1,077.42 mi (1,733.94 km) |
| Sligo to Olhao | 1,191.61 mi (1,917.71 km) |
| Sligo to Oliveira de Azemeis | 927.70 mi (1,492.98 km) |
| Sligo to Oliveira de Frades | 936.32 mi (1,506.86 km) |
