Train from Lisbon to Porto

It appears Lisbon (Lisboa) has six train stations. Lisboa – Oriente is the station you want to take the train from to Porto (3h): https://www.cp.pt/passageiros/en.

You certainly can take the train to Porto from Oriente, the Alfa Pendulars (fast trains) stop there. But, if you are staying in central Lisbon it would be a lot easier board the train at Santa Apolonia where they originate.

Read more at: https://www.seat61.com/trains-and-routes/lisbon-to-porto-by-train.htm

Thank you, I think that is the information that I needed.

There's some good information on Seat 61
https://www.seat61.com/trains-and-routes/lisbon-to-porto-by-train.htm

Tickets are cheaper if purchased in advance.
The stations we inputted for our ticket were Santa Apolonia (Lisbon) to São Bento (Porto). The fast train ends at Porto Campanhã but if you input São Bento, the transfer will be free. I really like that last leg of the journey from Campanhã to São Bento since it goes over the river and the views are fantastic. Also, the São Bento station has amazing tilework.

I totally agree with boarding at Santa Apolonia instead of Oriente. Oriente is quite large on multiple floors. Frequently (it seems to me), the elevators aren’t working so I’ve ended up lugging my suitcase up or down stairs. Santa Apolónia is all on the ground floor and very easy to navigate.

And, yes, if you can purchase tickets ahead of time, they are cheaper. But, trains in Portugal are very inexpensive if you can’t.

Some great added helpful information.
Thank you very much!