Airline ticketing is the process of purchasing a ticket for air travel. It involves selecting a flight, choosing a seat, and paying for the ticket, which can be done through various channels such as online booking websites, travel agencies, or directly with the airline. The ticket serves as a confirmation of the passenger's reservation and includes important details like flight times, departure and arrival locations, and fare conditions. Once a ticket is purchased, it is typically issued as an electronic ticket (e-ticket), which can be stored on a mobile device or printed out. Passengers must present their ticket, along with a valid form of identification, at the airport to check in for their flight. Airline ticketing also includes policies on cancellations, changes, and refunds, which vary by airline and ticket type.