I usually fly Carcassonne - Reus or Valencia on this route - along the valley from Carcassonne then turn right at the coast and follow the coastline. Glorious flying.
There's a great VFR route around the back of Barcelona, and all ATC stations are really helpful.
If range is short, there's Perpignan, Gerona etc.
Just beware winds between Carcassonne and the coast - 50-60 knots not uncommon.
Good luck!