Of the more than 230 million travellers that fly in Europe each year, roughly 30% of them fly with cheap, discount airlines such as easyJet or Ryanair for their travel needs. Since the deregulation of the airline marketplace in 1997, the rapid growth of discount airlines and availability of cheap flights has driven down the prices of traditional airlines while simultaneously increasing the number of travellers who choose to travel by plane to their final destinations. These airlines manage to offer cheap flights through a number of practices which help to keep travel prices low, such as only flying to destination airports with low landing costs and having a rapid turnaround while on the ground.