Out of curiosity I did a quick search on the cost of sailing from Portsmouth to Santander (in April)and the charge was £252 return as a foot passenger. This is made up of £65 travel each way and £61 for a cabin each way. Although there are reclining chairs which presumably cost less, these are not available until all the cabins are sold out.
Will take a look.We use Brittany Ferries services on a regular basis back and forth to France and once a year home via the Santander (or Bilbao) service. Believe you me, it's worth paying for a cabin.
There is a public car park next to the ferry port , is that any cheaper than BF own parking space.
Not quite retired yet.The ferry is a great option as it is easy and if one doesn't use a cabin, cheap, for such a long distance. The trick is to do what quite a few people do - book a reclining seat but sleep on the carpet in one of the reclining seats salons - there is always room, it is warm on the boats, and I have always had a comfortable sleep. There are disabled toilets that give one a private space for washing (yes, I know, don't leave a queue of people in wheelchairs outside ). Think of it as practise for the refugios!
The bus and rail stations are only a few hundred yards from where the ship docks - but it does depend on where you are starting your Camino as can be tricky to link up with the right times.
@Stevenlou - Kings Cross station to Waterloo station is less than three miles and is an easy and fast cycle ride - no problem!!
and ... are you lucky enough to be retired? A senior railcard costs £30 and gives 1/3rd of fares - would make a huge difference to your return train fares. There is also the "two together" railcard also offers 1/3rd off!