It is likely that this will be a well attended match. One should plan to arrive in plenty of time.
There is a train service (www.cp.pt) as follows:
Dept: Portimão 13h12
Change at Tunes Junction
Arrive: Lisboa Sete Rios 16h53
From Sete Rios(Metro Station - Jardim Zoologico - in same complex), take the Metro line "Linha Azul" in the direction of Amadora Este and descend at Metro station Colégio Militar/Luz. Then follow the crowds.
It will be difficult to get back by public transport the same night! The only option is the 01:00 www.renex.pt bus departure from Lisbon Oriente Bus Station (Taxi from Éstádio de Luz) to Portimão arriving 04:45. I would suggest that it would be better to plan to return the next day.
There is a train service (www.cp.pt) as follows:
Dept: Portimão 13h12
Change at Tunes Junction
Arrive: Lisboa Sete Rios 16h53
From Sete Rios(Metro Station - Jardim Zoologico - in same complex), take the Metro line "Linha Azul" in the direction of Amadora Este and descend at Metro station Colégio Militar/Luz. Then follow the crowds.
It will be difficult to get back by public transport the same night! The only option is the 01:00 www.renex.pt bus departure from Lisbon Oriente Bus Station (Taxi from Éstádio de Luz) to Portimão arriving 04:45. I would suggest that it would be better to plan to return the next day.