It always used to be possible to buy a ticket at an airport ticket counter. However, this has become harder to do in recent years, for several reasons. More recently, the patterns of ticket-buying, flight scheduling and plane-filling all have become subject to much more intensive analysis by the airlines in the interest of maximizing their system efficiency and profit margins. However, you can still pay cash for tickets but only after showing valid ID cards and other documents. The best and most suitable way to buy tickets is through the credit card.