etapas cascais to santiago

Well the etapas must be the same has the ones from Lisbon. Cascais stays a little bit southwest from Lisbon, so if you don't decide to walk near the ocean or in that direction, you will reach Lisbon.

About the Albergues, if you do it from Cascais to Lisbon, and then following the "normal" route, check this list: http://www.vialusitana.org/en/albergues_eng/ It's the most complete list for the Albergues in Portugal.

There is a route that goes on the opposite way, making you go west, and then north, that don't pass Lisbon, but this it's not an official route. You can check this route in here: http://www.caminodesantiago.me/community/threads/alternate-routes-out-of-lisbon.19928/ See the recommendations made by the Forum Members.

If you need something, mail me back to metalmelitia666@gmail.com or contact vialusitana.org

Best Regards
Diogo