Nowadays, all airlines have a pricing department which is responsible for yield management. In other words, their job is to adjust the price of tickets in order to get the maximum possible profit for each seat on the flight. Ticket prices vary according to supply and demand and depend on how full the flight is, and when you make your reservation. The result is a tremendous difference in prices. In one investigation, Le Monde newspaper made enquiries at different times about Air France tickets on the same flight from Paris to New York in economy class. They were quoted 17 different prices, ranging from 467-3228.