I see that alongside "London" in the Wizzair timetable they have a column headed Code which says "LUT", same for "Milan" with "BGY" alongside. No explanation at all. Unless you are knowledgeable about aviation you will not know that these are peripheral airports, not the main ones. At least Ryanair does say the actual name in smaller type underneath.
Sorry LGS6753, website doesn't look professional at all in this respect.