We have done the run to and from Santander and Bilbao, and back, twice in the last 2 years.
The distance is about 650 miles, which if you have a fast comfortable car, you can do in one day, about 9 hours drive. using the "Tom-Tom" motorway based route, which takes you past Vallilodad and Salamanca, then west along the Madrid / Lisbon motorway, where you will hit the A2 motorway straight down from just below Lisbon, to the Algarve.
The Spanish motorways are toll-free, good quality, and you dont have to worry about speedlimits, except where they tell you....usually going around the big centres. The Portuguese motorways have tolls on them.
From memory, the toll from just after the Portuguese border, to the end of the A2, is about 24 euros.
One tip.
Spanish petrol is far cheaper than Portuguese. There is a filling station about 5 km from the border. Fill up there!
We left Santander at 12, mid day, and were sat in A Gale restaurant having our first sip of Planalto, just after 9 that evening.
The 2nd....far more civilised and relaxing method, is to burn the first 200 kms down from Santander/Bilbao, then when when you get into the Extramadura, stop off in one of the lovely walled Spanish hilltop towns like Trujillio, or Avila....beautiful atmospheric medieval walled cities....pure El Cid, and stay in an old monestary or palace, dating back 600 years or so....AND they are not horrendously expensive.....certainly not as expensive as a city centre hotel....and the local food.....
If you want something larger, try Cacres, still with an old walled centre, but also the regional city of the Extramadura.
some people will advise you to stay in one of the cities en route....WHY??? That's like stopping off in Birmingham instead of the Cotswolds!!!
This will give you a taste of the real, old Spain....very few modern concessions to modern tourism.
The trip down to this area will take about 4 hours from the northern Spanish coast, and it will give you time to divert through the Extramadura national park as you get closer to Trujillo and Cacres.
See off the major milage.....then set your sat Nav to take you across country the last 50 km to your overnight destination......well worth the effort.
Like wise, the run down to the Algarve, will take you 4 or 5 hours the next day.
Draw a line on your map, so you do the straight line to Carvoeiro, ignore the motorways, which are actually a huge dogsleg, and enjoy the countryside of this beautiful area....and you dont get the stress of a motorway.
Doing it that way....you have a holiday, before your holiday.
Enjoy your journey. We certainly did
