Lets summarise this:
There are three ways to get from Portimão to Lisbon by Public Transport:
1) Train - http://www.cp.pt
Departures (Summer 2010 timetable) at
6h29
8h50
13h10
14h28
16h38
18h28
Transit Time to Lisbon between 3,5 and 4,5 hours.
Train Change at Tunes Junction.
Descend at Lisboa Entrecampos for Downtown Lisbon and Lisboa Oriente for Lisbon Airport.
Prices up to € 22.50 depending on train.
2) Bus - EVA/Rede Expressos - http://www.rede-expressos.pt - Arrive: Lisboa Sete Rios Bus Station
Extract of Bus Timetable (includes eva and rede expressos) here:
http://scr.bi/dzQThc
Prices between € 18:00 and € 19:00 one way per adult.
3) Bus - Renex - Arrive: Lisboa Gare Oriente Bus Station
Timetables here in pdf format: http://www.renex.pt/HorarDwn.php
(Site downloads not working at present.) Prices usually less than Rede Expressos but transit time about 4,5 hours.
