Originally Posted by
TravellerFrequently
I am using google flights primarily - is that the best tool?
I would tend to use itamatrix. I will use google flights for something simple or to get a quick broad sweep of fares, but for something more complex like a multi-sector trip and to help with fine tuning the itinerary I find itamatrix much more powerful. Also you can see the fare rules on itamatrix which you can't on google flights.