We suggest you to contact us and we’ll do our best to help you, but…
By plane, choose the cheapest flight; Lisbon (106km) airport is the best. Then, get a bus (“see public transport”)
By car, go towards Leiria / Batalha and follow the direction Porto de Mós
By public transport (bus)
from Lisboa or Oporto get a bus (Rede Expressos, Flixbus, …) to Leiria.
There, you easily get a Bolt or Uber to Porto de Mós.