I am traveling with my family to Spain in June. I booked an 11 day economy car rental using Expedia for a AVIS car picking up at the Barcelona airport and dropping off at the Bilbao airport for $26.10/day.

Our flights from the US are in/out of Barcelona, so we decided to maximize our vacation time by flying back to Barcelona instead of driving.

Try checking the normal sites (Expedia, Yahoo, Orbitz, Hotels, etc.) and see what you come up with.

Roger Denver, CO