I am sure this hasn't changed, and the whole plane is open, so to speak. When you select the link, it actually sends the fare class referred to to the popup window, and the link shows up in the status line of your browser (javascript:SeatMapLinkByFlight.showSegment(2,'A') ). This is a convenient way of seeing whether the "Tango Plus" you see is A, L, ... up to B, and helps explain the difference in price between various flights.