This just caught my eye and I thought it worth commenting. There is one direct bus from Muxia to A Coruna and there is one which drops you off on the main Cee - Coruna road and from there buses are frequent. There are more from Fisterre and several from Cee.
What I DID want to suggest - to anyone who just can't stopping walking and has plenty of time - is that you consider
WALKING to A Coruna! There is a direct trail all along the Costa da Morte some of which I shall be waymarking to the Little Fox. It consists of Yellow and White parallel markers. Almost all is coastal and along the cliffs and beaches. I have walked bits of it and it is simply ESTUPENDO! You would pass through Ponte do Porto which was the original landing for Muxia from the sea (Ria de Camarinas). I would be very happy to help you in any way I can, and of course, would love to meet you here at The Little Fox House in Carantona (2.1 klms from Ponte) should you wish to chill for a few days.
Tracy
http://www.pilgrimagetoheresy.blogspot.com