Is it cheaper to book in advance or last-minute?

In particular, airline tickets don't usually get cheaper when the departure date approaches. On the other hand, flights are usually the cheapest when you book four months to three weeks before your departure date. In general, flights tend to be cheaper at the last minute if there are still a significant number of seats available. On the other hand, if the flight is almost full, the prices will most likely be inflated.

There is also a correlation between the cheapest last-minute flights and short-distance destinations, as well as between the most expensive last-minute flights and long-distance destinations. Because as the departure date approaches, every day matters. This means that, in general, booking your plane ticket ten days in advance is cheaper than five days in advance, which is cheaper than two days in advance.