Airport Granada (LEGR) IFR

Quiet airfield in great scenery. While vacating the runway, request directly with the Tower to get Avgas promptly from the fuel truck at 2.69€ per liter.
Pay the airport fees on the 1st floor of the terminal—landing only 23€, but mandatory handling for Non-Schengen departures that slows you down, is completely unnecessary, and costs 50€. Fees, fueling, and handling payable by credit card.
Entry and exit as well as customs and exit formalities via a separate checkpoint at the Guardia Civil.
For the trip to Marrokko probably still the cheapest airport.