I have had a recent visit to Lanzarote, and noted both on my arrival day (Sunday 20th October) and departure day (Sunday 3rd November) that there was an EI 7778 / 7779 flight operating.
This flight did not appear on the website to book, a scheduled Sunday arrival commenced on 27th October for the Winter timetable, meaning that there were 2 departures on both 27th October and 3rd November.
Was this additional service a Charter flight, did it operate for the whole of Summer 2013 or just from late September / early October when demand for holidays in the Canaries increases ?