The concept of hidden city ticketing refers to a practice where passengers buy a ticket for a flight that has an intermediate stop (node) before reaching their final destination, effectively getting a cheaper ticket than if they had booked the original direct flight. This is done due to the airlines' pricing mechanism not always correlating with distance traveled, leading some passengers to take advantage of this loophole. While it may seem beneficial for passengers, hidden city ticketing can have negative impacts on the aviation industry, such as upsetting the balance of demand and revenue. Airlines also use hidden city ticketing as a means to fill vacant seats and generate profits.