The idea that flight search engines like Skyscanner reflect the impact of local events is a bit too direct in our context; their primary function remains price comparison and itinerary flexibility.
Here, in Belgium, we use these tools to find the best price for a flight to Spain, not to decode the local cultural calendar.
If prices increase, it's often just the high season or general demand, not necessarily a specific event like a festival.
A tool like Google Flights is designed for flight logistics, not to interpret the social context of a destination or the atmosphere of an event.
We don't look for the festival atmosphere there, but rather if we can leave on a Wednesday instead of a Friday to save on the plane ticket.