Speaking to TravelMole at the Convention, he said the collapse of Monarch could potentially lead to other failures as some companies, who sold lots of Monarch seats and holidays, are left with the burden of paying to bring customers home. Comparing the US airline market with the European market, he said while four airlines - American, United, Delta and SouthWest - hold 70% of market share, in Europe the four largest airlines - Ryanair, Lufthansa Group, IAG and easyJet - hold just 49%. "There is definitely room for further mergers, acquisitions, or joint ventures in Europe," he said. "Whether it's good for consumers or not is another question." Get the full story at TravelMole