Flying to your Camino from the West Coast of the United States/Canada is a complex arrangement if you are trying to save a buck. I assume the CF is your walk. Some ideas and considerations:
1. Use Google Flights. You can put in 2-3 'track your flight' notifications: RT Vancouver-Paris, Madrid, Barcelona. You will see prices jump around quite a bit week-to-week.
2. Consider your tolerance for pain. Maybe it's not worth it to you to be in transit for another 6-8 hours in order to save 100 bucks in airfare.
3. Consider your time of arrival and departure from Europe. If your are arriving Madrid at 9:00 at night, it can screw everything up as far as expense and useful R and R.
4. Look at multi-city tickets. There are some surprisingly reasonable fares: Fly into Dono-San Sebastian, fly out of Santiago. I see an ok fare right now from PDX of @ $950. Dono-San Sebastian gives you good access to either Pamplona or SJpdP.
5. This isn't a money saver but consider one-way flights. You can get great prices TO Europe from the West Coast and about twice the price coming home. $450 going, @ $900 coming home if your are making the arrangements a couple of weeks in advance. Great flexibility there.
6. Join an airline club, either a single or a consortium of airlines. I particularly like Flying Blue which includes KLM, Delta, Air France among many others. I recently saw a one way fair PDX - CDG for 260 bucks!
7. Find a credit card that optimizes your points. We have Chase Cards that work pretty well. We rent here in PDX and just got a BILD C.C. that allows you to pay your rent free of charges, take the dollar-for-dollar points and transfer them to airline partners: Flying Blue, Alaska, Air Canada, United. Just paying my rent I figure I'm getting about a flight and a half for here in the States.
That's about it!!