Caporegime
Use Google Flights/Skyscanner for the best rough prices, then use Momondo to find the absolutely cheapest - this last step is what people often don't do. I found flights for Scotland - Japan for £440 this way. Recently paid £12 for return flights to Germany as well.
This isn't true, just a fallacy posted online.
I just tried it, the results are not totally the same though.