driving from la seu d'urgell to san sebastian
 

what is the best way to get from la seu d'urgell to san sebastian and how long will it take? we're finishing our spain trip there.

karenecox,
The quickest way, but not the most scenic, is to go through Zaragoza and do the autoroute. I just checked
www.viamichelin.com, and it's a 540 km. drive. The estimated driving time is about 6 hrs.
The northern route through the Catalonia, Aragonese and Navarran Pyrenees valleys is breathtaking but warrants several days for exploring all the beauty on the route.