YSK about Book With Matrix. It allows you to book a flight directly from ITA Matrix, a detailed tool which helps you find the best and cheapest flight.

DISCLAIMER: No I am not affiliated with either of these websites, just super stoked on this and wanted to share with fellow travelers.

Book With Matrix has totally saved my life. It lets you essentially copy and paste your itinerary from ITA Matrix, whereas you usually would have to search on multiple websites or go to a travel agent to find the exact fare. I have used Google Flights in the past, but I don't find it nearly as helpful or detail oriented as ITA Matrix. If you use ITA Matrix often, this is really helpful!