Sorry for the delay. Iḿ currently in Italy.
There is currently no direct bus service from Seville to Lisbon.
www.alsa.es have a daily service that operates via Faro in the Algarve.
Dept:SEVILLA 15:00
Arr: LISBOA ORIENTE. 21:00
www.eva-bus.com also offer a service via their Faro hub to Lisbon Sete Rios bus station as follows:
Sevilla Faro 07:30 10:10 Daily
Faro Lisboa 11:00 14:15 Daily
or
Sevilla Faro 16:15 18:55 Daily
Faro Lisboa 19:00 22:15 Daily
Please note that these services are for Winter 08/09.
It is HIGHLY likely that these times will change for Summer 09. Please check in May or June on the respective websites.
As regards Lisbon to Porto, you can travel by bus or train.
If you visit my blog at:
http://barlaventostravelblog.blogspot.com
and scroll down on the right until you come to the panel entitled
"Algarve & Portugal - Travel Transport Links"
You will find links to Portuguese Railways, Renex Buses and Rede Expressos buses which will offer you a variety of options for the Lisbon to Porto Sector.
