In reply to jacobjacob:
We managed to get from Barcalona to Huesca a few years ago. I think we may have changed at Zaragoza, but can't really remember. Then the taxi from Huesca to Riglos was only a few euros each.
It's a bit of a pain in the arse, probably easier if you can speak a bit of Spanish, we were never really sure if we were on the right coach
Sorry that's incredibly vague! But it is possible