My family is spending two weeks in Europe this summer. We want to stay in Madrid one week, and in Loriant, France one week.

Which will be my better deal if I'm not traveling all over: eurorail, airline, or other bus/train?

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?

Any advice?