This is one thing many guests to Europe don't know, but passengers flying in/out of your EU, In particular using an EU airline, have a LOT of legal rights because of one thing known as the EU Regulation 261/2004. I use Skyscanner almost exclusively. I’ve never heard about the ITA https://socialbuzzmaster.com/story5199477/how-to-find-cheap-flights-to-europe-from-the-us-an-overview