| Houthulst to Montemor-o-Novo | 1,010.00 mi (1,625.44 km) |
| Houthulst to Montemor-o-Velho | 932.84 mi (1,501.27 km) |
| Houthulst to Montijo | 1,026.21 mi (1,651.52 km) |
| Houthulst to Mortagua | 904.52 mi (1,455.68 km) |
| Houthulst to Moura | 1,022.35 mi (1,645.32 km) |
| Houthulst to Murtosa | 898.77 mi (1,446.42 km) |
| Houthulst to Nazare | 976.77 mi (1,571.97 km) |
| Houthulst to Nelas | 888.88 mi (1,430.51 km) |
| Houthulst to Obidos | 993.50 mi (1,598.88 km) |
| Houthulst to Odemira | 1,085.62 mi (1,747.13 km) |
| Houthulst to Odivelas | 1,027.54 mi (1,653.66 km) |
| Houthulst to Oeiras | 1,037.68 mi (1,669.98 km) |
| Houthulst to Olhao | 1,100.52 mi (1,771.12 km) |
| Houthulst to Oliveira de Azemeis | 888.02 mi (1,429.12 km) |
| Houthulst to Oliveira de Frades | 886.65 mi (1,426.93 km) |
