Google Flight Search has announced new features, they include:
(1) Full Screen Mode: click on the map to enter a full-screen exploring experience
(2) Most Popular Destinations: whenever you type a region (e.g. “South America”) as your destination in Flight Search you’ll see cards for the most popular destinations within that region, and destinations personalized for you based on your past searches.
(3) I'm Feeling Lucky Button: Simply select the “I’m Feeling Lucky” button from within the expanded map and Google will give you ideas of where to go.
Here is a video:
Forum discussion at Google+.