Even though there is no direct train linking Porto and Lisbon Airport (LIS), you can easily move between these destinations by rail. First, you need to reach Lisbon's Oriente train station by taking InterCity or Alfa Pendular trains which depart from Campahna and Vila Nova De Gaia-Devesas railway stations. Upon arrival to Oriente, you can choose from several transfer options, including the metro, which is the fastest way to get to the airport as its only 2 stops away from the station. The whole journey with transfers will take you approximately 3 hours.