The first guess sounds spot on but the other guesses are incorrect.
So Keflavik OK but not Nice, Marseilles or Naples? Trying to think of other rivieras! Rimini (not even sure it has an airport)? Genoa (though it's not called the Ligurian Riviera)? Somewhere in Croatia (Adriatic Riviera)? Perhaps Sardinia? Are Montpellier and Perpignan on the French Riviera? Is there an Atlantic Riviera (Bordeaux)?