My family is spending two weeks in Europe this summer. We want to stay in Madrid one week, and in Loriant, France one week.
I remember looking at something similar before where I could buy a three-way airfare, flying a triangle to end up back in Madrid. Is that still offered, and if so, what was it?
Check out
http://www.Continental-Auto.es I believe the Buses depart from
Avda. de American Intercambiador: There's a nonstop at 09:00 daily (5-hours) to Irun. It's probably a
Supra Service and, as such may cost a bit more than the Euro 27.50.
I'm not sure if there is a Ferry from Bilbao to Roscoff (Fr.). You might want to check that out.
Rather than backtrack to Madrid, consider flying 'Open Jaw' (US to MAD; CDG to US) for your transatlantic journeys.