13 August 2010 Delta Air Lines has become the first airline to allow Facebook users in the U.S. to buy flight tickets without having to leave the social Network dubbed Ticket Window', Users can select different search criteria and then view results from within the application including route options, aircraft type time and inclusive prices.once a fare is selected the users can enter the usual passenger and payment details and the booking is complete.facebook members can also share their travel plans with friends on the social network.Delta says future releases will contain more social elements, such as coordinating group travel more easily