Do remember you will probably want to return home! Do you really want to fly/bus/train back to Paris from SdC? What's another thousand miles for a pilgrim? Go to a professional travel agent, in off season they can often arrange a flight-US to Madrid to Pamplona and return SdC to Madrid home as direct flights saving money, time, and those lovely airport experiences. Pamplona to Roncesvalles by bus and on to SJPP by taxi. Easier than it sounds. CdG in Paris is a huge place and it can often take an hour plus to get between flights. Madrid is smaller and SdC is best, a small user friendly airport, not too many flights, easily accessible, and quiet. You can also have a lovely night in Pamplona -a sweet town - on the way in, I believe Iberia does still offer a hotel discount for those flying with them.