This is one area lots of visitors to Europe have no idea, but travellers flying in/out of the EU, Primarily with the EU airline, have a great deal of legal rights thanks to something known as the EU Regulation 261/2004. Search on flight engines like google like Kayak®⁵ or Skyscanner®⁶ https://digibookmarks.com/story19544171/the-how-to-find-cheap-flights-to-europe-from-the-us-diaries