| Herenthout to Montemor-o-Novo | 1,068.85 mi (1,720.14 km) |
| Herenthout to Montemor-o-Velho | 995.70 mi (1,602.42 km) |
| Herenthout to Montijo | 1,086.73 mi (1,748.92 km) |
| Herenthout to Mortagua | 966.89 mi (1,556.06 km) |
| Herenthout to Moura | 1,078.32 mi (1,735.39 km) |
| Herenthout to Murtosa | 962.67 mi (1,549.27 km) |
| Herenthout to Nazare | 1,039.37 mi (1,672.70 km) |
| Herenthout to Nelas | 950.51 mi (1,529.70 km) |
| Herenthout to Obidos | 1,055.84 mi (1,699.20 km) |
| Herenthout to Odemira | 1,143.59 mi (1,840.44 km) |
| Herenthout to Odivelas | 1,088.88 mi (1,752.38 km) |
| Herenthout to Oeiras | 1,099.13 mi (1,768.88 km) |
| Herenthout to Olhao | 1,155.62 mi (1,859.79 km) |
| Herenthout to Oliveira de Azemeis | 951.79 mi (1,531.76 km) |
| Herenthout to Oliveira de Frades | 949.50 mi (1,528.08 km) |
