Marrakech (Morocco) to Almeria (Spain) two months ago in a DR400. About 4+ hours. The most freaky was a couple of days before that, ATAR (Mauritania) to Laayoune (Morroco), 3+ hours of pure desert, not a soul in between, glued to the artificial horizon because of the zero viz outside. The most interesting was on the way out to Dakar: breakfast in France, lunch in Spain, dinner in Morroco. That afternoon flight was also my first and only intercontinental flight as P1!