You can see the price for flights for multiple dates in their calendar. This makes price comparison between different dates extremely fast and easy
You can search up to 5 airports at once: So if you live in Los Angeles, you can search from any airport in the area all in one search
You can filter based on price: If you are on a budget, simply type in your budget, and click the map below. Google will let you know where in the world you can fly based on your budget
You can track prices for flights you are interested in and get notified immediately via email when there is a price change. This has saved me so much money in the past!
Google flights has amazing filters: you can refine your search by time, stopovers, airlines, flight times, etc. This can save so much time when trying to find the right flight for you
Google gives you specific information about the airplane you will be traveling on: the type of seat, legroom, entertainment, baggage allowance, etc. This can be a great way to compare different airlines and services