Airline ticket is the ticket that has a traveler to be able to board by a plane. This is an authorization that is purchased for travel, which is a valid contract (with this ticket, insurance covers the traveler by the Warsaw Convention).
The price of a ticket varies according to destination, departure date, airline, airport departure and arrival flight chosen. A significant proportion of the price of the ticket corresponds to the various airport taxes. The rest depends on fuel prices and services on board. Thus, for low cost flights, services are minimal, which explains the low cost airline tickets low cost.
Typically, the ticket in its paper describes the various flight information corresponding (airport of departure and arrival times of departure and arrival, flight number ...)