The idea that flight search platforms can transform the complexity of local events into a concrete action for travelers is very risky; they do not manage the real risk.
The problem is focusing on the plane ticket without considering the overall stay conditions.
Without checking accommodation availability and cost of living on-site before confirming a flight, you could find yourself in Hanover during a big fair with a cheap flight but no hotel room.
Always anticipate unexpected consequences, because a flight does not guarantee a viable stay.
The fail-safe is always to verify accommodations first.