They're making it easier to search for flights and arrange a trip. It's UX and makes me not hate the airlines/travel process as much. And I end up buying the flight from the airline anyways, and in many cases doing the arranging on the airline site in the end once it's determined, so Google is giving that back. They're not taking stuff from the airlines, I mean what ads and stuff are on the airline sites anyways specifically during the search process. Where they are taking away is from the Expedia's and other aggregation sites that offer a garbage/hodgepodge experience that drives people crazy.