Castromil (Monbus) connects Fisterra to Santiago.
Grupo Ferrin connects Muxia to Santiago.
There is more frequent service from Fisterra than Muxia.
Castromil (Monbus) connects Santiago to Vigo.
Autna bus connects Vigo to Porto
ALSA bus connects Santiago to Porto.
Renfe train connects Santiago to Vigo
Renfe train connects Vigo to Valenca
CP train connects Vigo to Porto and Valenca to Porto
Grupo Ferrin
http://www.grupoferrin.com/
Castromil (Monbus)
http://www.monbus.es/index2.htm
Autna
http://www.autna.com/
ALSA
http://www.alsa.es/en/
Renfe
http://www.renfe.com/
Comboios de Portugal
http://www.cp.pt/cp/displayPage.do?vgnextoid=87cbd5abe2a74010VgnVCM1000007b01a8c0RCRD
Santiago
http://www.tussa.org/web/interior.php?txt=arbore_web5&lg=cas
Vigo
http://vigobus.com/