We just had to drive to spain recently and used all toll roads as speed was more important than cost
I have calculated the French tolls And fuel from Calais to the Spanish border at Irun
Tolls RETURN £267
Fuel RETURN £280
Total £547 approx
This doesn’t take into account Aires or camp sites costs .
The ferry costs to Santander (late booking no discount) was £999 with ordinary cabin
I have the full list of toll sections . if anyone wants them I will add here
Hope this is useful
I have calculated the French tolls And fuel from Calais to the Spanish border at Irun
Tolls RETURN £267
Fuel RETURN £280
Total £547 approx
This doesn’t take into account Aires or camp sites costs .
The ferry costs to Santander (late booking no discount) was £999 with ordinary cabin
I have the full list of toll sections . if anyone wants them I will add here
Hope this is useful