Honestly, believing that Skyscanner "concretizes" the impact of a local event is pure naivety. These platforms show you a price, not the reality of what happens on the ground.
It doesn't tell you about crowded streets, transportation shortages, or the fact that local shops struggle because everything is invaded by tourists.
Take any city in the UK during a big festival, flights are more expensive, yes, but the local supermarket ends up empty and traffic is a total hell.
This dogma of "data explaining everything" is just another cliché of the industry to sell gadgets, not to understand life.