Peaceable Projects Inc. is a U.S.-based non-profit group that brings the vast resources of the wide world together with the ongoing needs of the people who live, work, and travel on the Camino de Santiago pilgrim trail network in Spain.
It's a long trip by train, about 24 hours but if you like train travel, as I do, it's worthwhile. The train leaves Santiago at 9am arriving at Hendaya/Hendaye (French side of the border)around 8.30pm. At Hendaye you change to the night train (couchette) to Paris Gare d'Austerlitz arriving around 6.30 to 7am. Check http://www.renfe.es and http://www.voyages-sncf.com for timetables and prices.