Check out the requirements for entering Portuguese territory at this link
The easiest and fast way to get to the Venue from the train station is by Uber (approx. cost 5€). Walking will take you approximately 30 minutes.
Oporto Airport is located one and half hour away from Aveiro. You can rent a car or use “Metro do Porto” to travel from the Airport to Estação da Campanha in Oporto and from there to Aveiro there are plenty of trains.
Lisbon Airport is located two and half hours away from Aveiro. You can rent a car or use “Metropolitano de Lisboa” to travel from the Airport to Estação do Oriente in Lisbon and from there to Aveiro you will find a train (Intercidades or Alfa) every hour.
Aveiro is a medium-small size town. Most of its downtown area is walkable and you will not walk more than 20 minutes to reach any of the most interesting places. Uber or car is the best solution but many of the Aveiro citizens also use the public bikeshare system.